Hey I learned and I was a big guy too. Still am as a matter of fact. Just take it easy and remember what Jim Valvanno said, "Never give up, never give up, never give up."
After I busted my butt on the rough driveway, I moved on to a church parking lot to practice on. Nice even pavement with a hill I could ride up and down. After fifty years between bike rides, I thought it might be a good idea to skip the traffic at first. I still think it was. I bought a bike rack for the car so I could carry the bike to a good place to ride it for a while. Now I try to ride it to a good place to ride it lol.
Also that is one good looking bike for a china girl motor...