I've been gaming for over 30 years. I started playing Basic D&D and moved to Expert, Advanced, Advanced 2nd Edition (skipped 3-4) and have started playing again using D&D 5e. In fact, I currently DM a group of 7 people on Tuesday evenings (every other week, next sessions is July 17), I'm currently playing in a Storm King's Thunder campaign on Wednesdays and I DM for the D&D Adventures League on Thursday evenings for a local store.
I have played D&D, Cthulhu (from the late 80s/90s), Palladium, TMNT, Rifts, GURPs, Car Wars, Paranoia, Vampire, Werewolf, Marvel Superheroes, DC Heroes, Battle Tech, Cyberpunk, Shadow Run, Twilight: 2000 (and a bunch of other GDW stuff), Star Wars from way back in the day, and more. So, yes, I'm experienced.