If you didn't take a boating course online then I think it would be a bad choice to buy a boat. Because you could either get yourself killed, or injured if you don't know what you are doing.
I already took an online boating course, and I past. I also bought a life jacket, and flash light. Currently I am buying whatever I need before buying a boat. I made a list of what I need, so I am crossing off what I am purchasing, so I can go on a boat.
I would like to either live on a boat, or travel on a boat. Well maybe I can do both.
Before buying a boat, it's a good idea to think about what type of boat you want, and where you want to put it, and where you want to go with it.