Most people start their genealogy when they are in their fifties or sixties or later. By then, their older relatives are usually deceased.
A very common complaint is that we didn't ask questions of the older people. You are luckily interested at an early age, so you probably won't have that problem the rest of us have if you act now.
I assume that you have older relatives that you can question and record their information. There are genealogy books that even have prepared questions.
I pulled out one of my genealogy books just now. It is called "The Unpuzzling Your Past Workbook: Essential Forms and Letters For All Genealogists", by Emily Anne Groom. Perhaps your library has it. Your library probably has a few other books which can get you started.
This particular books has the necessary forms for recording information, but the questions near the end are fantastic. There are prepared questions depending upon the time period. Time periods are:
Pre-1930 Period Depression - 1930s World War II and the 1940s Decade of the 1950s Decade of the 1960s
Questions stop there because the book is old (copyright 1996) but you should be interviewing the older relatives first.
I don't know of any age limits for the genealogical societies I have joined. Why can't you join? The members would probably be very happy that someone started this hobby at an early age.
I don't know what you mean by "I've gotten pretty far in my genealogy", but perhaps you can get some ideas from this site.