No worries, it can be confusing when you first start out. As Christopher said, you can post as much as you want. But it's nice to keep a single thread going when possible so that it's easy to track the conversation so far.
When you have a new topic, then start a new thread. As you get more pics and more news on this bus, this is probably a good thread to keep going!
Congrats on getting a bus, and keep us updated as you work things out. There are many knowledgable people here that will be able to give good advice. The more you listen, the easier the conversion will be.
Can't wait to see more pics.
Edit: I see there is another bus 101 thread. That would also be a good one to keep going, just pick one and put all new posts in it