Thats good progress. It takes different times depending on how you spend your hours of "playing" the game.
People who spends more time in training such as freeplay, workshops etc goes further faster due to mechanics being strong against ranks below champ.
When reaching champ your mechanic outplay-wins will stall as opponents gets better at positioning and tactics.
I suggest playing more in training learning basic mechanics until they come natural for you rather than actual ranked games.
With basic mechanics I mean:
Recovery: half flip, landing flat, wave dash of walls
Ground play: ball carry, Bounce dribble, front dash flick, side dash flick, diagonal dash flick, dash shooting, dribble cuts
Aerial play: Fast Aerial, Basic wall to air, wall shots
Defending: Shadowdefense, Shadowdefense saves, backboard defense.
Some very basic tactics should also be learnt such as rotation and backboard rebound exploit against the lower ranks
Dont shoot on goal if someones in goal, that will just lead to a counter, instead put balls above goal so they get awkward and put rebound in or let teammate do it.
Dont drive ball straight into opponents unless it's 2v1 where ur teammate can take the rebound after the 50. Try to steer it diagonally away from them., and then dribble cut or fake :-)
Apart from this, do whatever you want but above is a suggestion I do to friends when they want to learn RL
If you learn all of the above so they sit natural for you, you'd be expected to be champ and can start to learn more advanced mechanics
ground pass plays, ceiling shots, Flip resets and fakes mainly
Please don't focus too much on musty, breezi etc. They're not really necessary, only showboating. But really fun!