So I recently bought a used bike off craigslist but the only riding I've done in the past is when I had a dept store Huffy "mountain bike" when I was 10. So yeah, I have very little riding experience.
I managed to ride around some quiet neighborhood streets but I've noticed that I have trouble keeping the bike straight while pedaling. I feel that I would have trouble passing anything without giving it a wide berth or that I could accidentally veer into someone who was riding next to me. Would this go away with practice or is something wrong with my bike? It's a 70s-era Schwinn 3 speed. I only plan to use the bike for short trips like going to the train station when I don't feel like taking the bus (1 mi) or to the grocery store or library (.5 mi).
I was reading through Sheldon Brown's site and realized I was starting and stopping all wrong. What else should I know?
Also this is an incredibly dumb question but I tried going up a mild incline and I couldn't even do that. I should be in first gear for hills, right?
Thanks for the help and I hope this is the right forum for this question.