Welcome to the forum.
Yes, there is a lot to learn. Start asking questions and reading posts on this and other forums.
I would start by going to RV shows and dealers to look at floor plans. Look at all makes new and used.
If buying used, condition is the most important thing.
A well cared for Brand X is probably a better buy than a beat up Brand A.
Leaks are a major concern for any RV. A small leak can do a lot of damage if not repaired.
Don't be in a hurry to buy. Take your time, look and learn.
Here's a list of
Acronyms and Abbreviations you will see used on the forum.
Have fun with your search.