OrdealVia is completely correct, but just want to add a couple things.

Don't let yourself get succered in by the cons and people who are going to want to take advantage of you. When you let people know you have cancer, you are going to start getting a ton of unsollicited 'advice' about everything from not taking your meds because, "Those are really poisons that the doctors use to keep you sick. You should stay away from those and use this <insert specific, really great treatment that is really a quack treatment that will either speed you to death or just suck away all your families money> instead!", to people telling you that the reason you have cancer is because your diet sucks and you should go completely vegan right now and it will cure you.

Some of these people are well meaning, but deluded. Others are outright hoping to fuck you and your family out of all the money that they can. When it gets bad, (and it will get bad), you need to remember that your doctors are your best allies. They don't want to see you die and they will tell you everything that they can to help you make smart choices to maximize your chance of survival. So if you aren't happy with how things are going, talk to your doctors about it. If you think there may be some merit to some 'alternative treatment', talk to your doctors about it before you try it. If you are thinking of herbal supliments, dear God, talk to your doctors about it first, (Real herbs have actual medical, active ingreadients in many of them. They can interfear with your Chemotherapy or have very bad reactions with it sometimes). Cancer sucks. The drugs they use to treat it are poisons. The trick is to poison the cancer enough to kill it or control it without poisioning you to death and the simple reality is that if your cancer matastasizes then this is a game that the cancer will eventually win. The hope, in that case, is to hold it off as long as possible and pray for further advances in treating it. The bigger hope is that is is early enough that the surgen can get all of it, and that you never have to face the ongoing battle with a cancer that has metastasized.

Aside from that, excercise is a good thing. How much of it you will be able to do will be dependant on you and what your reaction to your treatment is. I knew one guy who worked out three times a week, for two hours a workout, plus had two days of thirty minutes of cardio in between, (he was fighting metastisized pancratic cancer). I knew a woman who swam ever day for half an hour to an hour, (she had metastisized breast cancer). My late wife could barely move for a week after her chemotherapy treatments, (metastisized breast cancer).

Excercise will help you. The statistics indicate better outcomes for people who excercise regularly than for those who dont. However, treat your excercise regieme while being treated the same way you would treat it while you are sick. If you push to hard you will just hurt yourself. Finding the right balance there changes from person to person.

Lastly, depending on your specific chemo-therapy treatment, you will be toxic for several days after each treatment. You won't be able to hug your youngest, you will have to double flush after using a toilet, if you workout you will have to make sure to clean your sweat off any equipment to make sure you don't risk making other people sick, (you will be, literally, sweating out poison. The dosage esposure won't be to bad to people second hand as long as they are adults but it can cause rashes and in some peopls actual reactions).

You need to mentally prepare yourself for this stuff because living with it is draining, demoralizing, and disheartening. You need to make sure that you have friends and family who can help you get back up when it all brings you to your lowest point.

Above all, make sure you are comfortable with your doctors and trust them. In this, trust in their capability is more important than liking them, but you need to be comfortable talking to them and asking questions. When you are tempted by a bullshit wonder treatment you need to be able to tell your doctor about it and discuss it openly. When you just can't bring yourself to do something you need to be able to say so to your doc. Most importantly, when he/she tells you something, you need to be prepared to accept that he/she knows what he/she is talking about and is recomending the best course for you.

So do your legwork now for the oncologist and longer term medical support because you have some time for that, but don't wait on the surgery because the biggest, absolute best chance you have for long term survival is in your surgeon getting all the cancer before it metastizes.

Also, feel free to PM me at any point and I'll give you my RL contact details. I live on the far side of the planet so there is nothing I can do for you in person but I was there for my wife for almost four years as we delt with first her initial diagnosis, then the diagnosis of the matastisize, then her ongoing treatment, then her evendual death. I'll share with you anything that I know that can help.