There are currently four tiers at WGT Hack, Amateur, Pro and Master.
You advance through these tiers by playing and posting better scores. Here is how it works.
Your average is calculated by taking your 10 best scores out of you last 14 rounds.
Closest to the hole (CCHT) comps do not count.
Practice rounds do not count.
9 hole ranked round scores are double for average purposes.
Any tournament scores are counted.
Any ranked rounds are counted
Match play does not count towards the average
e.g. you shoot a 40 on the back nine of Bethpage, that score is doubled 80 to calculate your new average score.
There are currently no practice facilities. You can practice your putting (or any other shot for that matter) by setting up a practice round. You get 10 shots a hole so hit onto the green and then putt to the hole, putt away from the hole etc.
Hope this helps.