Welcome! The levels can be done at different speeds, have a read of jprspereira’s awesome guide to get your head round how they work.
For an example of what going fast looks like, check out the post from @neolaron who just hit level 60 today- congrats! They went fairly close to the theoretical maximum.
Main lesson though- there isn’t a universal ‘right speed’ to do wanikani- go with what lines up with your broader learning goals, keeps you motivated, keeps you happy and doesn’t burn you out. That might be different now than it is in 20 levels time, and that’s great too. Good luck!