Hiya! Welcome to GF! First geckos are so exciting! Glad to hear you've read what you need and are learning more! Geckos are aweosme - IMO the least intimidating and coolest reptile pet to start out with.
I'm not a long-time expert but guess I might give the advice to keep it simple - an under tank heater and simple substrate (like tile or paper towels - just NO sand) and a few hides and a humidity chamber should do you well
I've gotten stuff through lllreptile.com before and from local reptile expos - the expos definitely take the cake on price and variety! Where are you from? Someone could probably give you some advice on where a show near you might be.
Have fun looking around and meeting people!