JaLaBar
You progress up the tiers 1 at a time. Trust me, you don't wanna skip a few tiers. Not only does the tee box go further back, the green speeds get faster and faster too. Try not to rush up thru the tiers and take your time cos the clubs you'll need will not be unlocked for you to purchase.
Learn each and every course and don't just play the easier one's. Get experience from playing against others that are higher tiered than you and give some of the tiered ready go's a try when you get to pro tier and above. These are great tournies to know exactly how you compare against the players at the same rank as you and if you're ready to take the next step and move up.
Good luck and Happy golfing
Dazza