Honestly, I'd worry more about that seat. Bike seats can pinch nerves even if you're not a big guy, and if you are, you probably want to be careful with a narrow seat like that.
Good plan! The first time I rode my old bike after some years of neglect and a few extra pounds, I was quite alarmed when I got off the bike and found that some parts of me had fallen asleep. I have a new respect for making sure the seat is a good fit.