Do your own research in to treatments and possible treatments, but be critical of information you find and the sources.
Write down all your questions before you having any meetings with your treatment team, so that you don't forget what it was that you wanted to ask or bring up with them.
Don't be afraid to ask questions! I would strongly encourage that.
I agree with @kj 100% on his points.
Best of luck!!!
Be part of this supportive community