Hi there. I'm new to this forum and to cycling. I've been a runner for years and have been having some issues with my knees from it lately. I think my surgeries from my early 20s are finally catching up to me. My name is Kelly and I'm 37 years old and am a student again. I've given up my career and am putting myself through school. I joined another bike forum that wasn't very nice to me with my initial introduction and am hoping to have a warmer welcome than before. Since I am new to biking, I have a ton of questions. I haven't even started yet and am still in the research phase. There is so much to learn and I don't even know where to start. I live in Florida and have access to both the roads and paved/unpaved bike trails. I've asked a few people and they said a hybrid would be best for me to start on so I can figure out which I would prefer. They also said that being a beginner, I would have less tires to change. The other thing they suggested was to get a Trek bike. I do know Trek's are pretty good bikes, but I'm thinking that they might be a little out of my price range. I'm looking to buy a previously owned bike, but again don't know where to start or what to look for. My budget is around $200 (I'm finding most used Trek bikes are around $300). I'm 5'3" so I don't even know what size bike to look for. I don't know anything about tires or changing them (but am willing to learn). I don't really know anything about the differences in the brands. I don't know anything about clothing I should wear or "cycling etiquette" while I'm on the road. I've been told a few things here and there like getting the lights for the front and the back of the bike, a helmet (of course), the water bottle attachment, and a seat (because protecting your bottom is key). But that's it. I'm truly a beginner. I'm definitely committed to this, I just need some guidance. Any help would be greatly appreciated. Thank you in advance for taking the time to help me.