Hi unpar,
My tip would be to not be in any rush to storm through the tiers !! Learn the game and enjoy the experience, you will progress through the tiers at your own pace - dont push it.
I don't think I upgraded my clubs until I got into the Pro tier.
You will need to understand how your clubs work, and have a good knowledge of each course, because when you get up into the top of the Pro tier, or Master tier then the competition really ramps up - so having a good knowledge of the game will help you when the time comes.
just mho, for what its worth.
Enjoy, and a Happy New Year to you :-)
Cheers Doug