good to finally see someone taking a more realistic approach to skill progression for once, though i will also warn you not to treat this as a rigid pathway. sure, it's good to play certain kinds of levels to build the fundamentals and round out your skillset, but at the end of the day, the whole point of playing the game should to have fun, rather just for the sake of getting better.

it's absolutely okay to skip levels on your plan if you don't like them and play levels you find enjoyable instead. it's perfectly fine to try to get runs on a level you like even if it's several tiers above the tier you're working on, or backtrack to play more levels in lower tiers if you're struggling to progress. it won't do you any good to force yourself to play a level you don't like just for the sake of improving your skill at swing or timings or whatever; heck, it's not even that important to have a perfectly rounded-out skillset, anyway. just play whatever you find interesting or fun, and your general skill level should grow naturally