Great advice on the seasonal lots. My in-laws stayed at 2 separate seasonal sites. A few things to look for
1) Leases are typically run from April/May to mid Oct. It is cold in the winterin MN, warmer weather spots may differ.
2). While you can find good deals for used RV's at seasonal sites you now have 2 hurdles, finding the right RV AT the right seasonal lot. Otherwise you have to I've the RV, not huge, buts if you are behind mid-lease typically the balance of the lease is included I the sale thus tying you to that location.
3). Many seasonal sites have "age" rules. Meaning all new and sometimes existing campers can only be so old or they have to be replaced, ie less than 10 years.
These as well as others are why many don't like seasonal sites hence some of the commentary, but I stick with my original thought. Best way to start is the path you have chosen, experience is best used whe learn first hand. Enjoy.