There's no set number of times to move from Novice to Intermediate to Advanced and contrary to what RideSmart FAQ would indicate, they don't really do a lot of "promotions" that are initiated from the instructors.
They used to have lap time suggestions for levels but I don't see that on the website. For example, it used to be at Cresson that if you were doing lap times under 1:55, they'd suggest level 2 and lap times under 1:40, they'd suggest level 3. I think they stopped doing that because just because you can run a 1:38, doesn't mean you should be riding level 3 where it's mostly racers who will pass you on the inside in a corner as they run a 1:25 on their warm up lap.
I've seen you ride and I think you'll outgrow level 1 pretty quickly. You should start there...but you'll be in level 2 after a couple days. Just self register into level 2 when you find you are ready...you'll know when it's time.
Another track day that does stuff out at Cresson is 3:16 Trackdays...but I think they only had one this year. They mostly do the Houston track.
As far as race suits and gear. Expect to move out of novice quickly and get good gear. I've got an entry level suit (full leathers) you can have for cheap. Like $50 or so. It's a Sedici (Cycle Gear house brand) and I've been down it in a couple times but it protected just fine and is in good enough shape. We're close enough in size that my guess it that it will fit you. It will be way better than the junk they have in the RS trailer for rent.
I'd definitely get a good full face helmet that fits correctly. Since you like the fit of your Shoei modular, you can get a Shoei RF1200 for about $250 IIRC. DOT and SNELL approved and pretty cheap considering what it protects. It's worth every penny if your head hits the ground. I also have a Bell that fits pretty close to Shoei that you are welcome to try on. It was a buddies and he wore it about 3 times for track days and then decided he didn't like them and now he just rides his Goldwing. (he may have a race suit and boots as well...I can't remember if he got rid of it or not)
Anyway...hit me up if you want to see if stuff fits. I can also fill you in on all the good and bad of RideSmart and track riding in general.
PS... I want to do one more track day on it and then I'm likely selling my GSXR track bike. If you REALLY get into track, you'll want to start pushing limits a bit to see what you can do. When that happens, it's nice to have a track bike that you can crash without getting too sad about it. For $2-3K, you can buy a bike that you can turn a faster lap time on than your new one because it's tailored for track riding and you don't have to cry if you wad it up going for your personal best time.