KKPB

Hello all, i've found a Trek 930 local to me and I plan on picking it up tomorrow. I am a 350 pound 6'0" rider and I haven't rode a bicycle in probably 3 years.
I am going to be riding mostly paved smooth roads, some light trail use in the future.
Should I look at upping the tire size? What are the best inner tubes for people of my weight? I'm worried about them popping.

Also is the 930 a good choice for me? I have read other threads that suggest it is perfect for what I need

Any help is appreciated.
Thank you