Hi Crebin,
Just share some of my experience...
I began learning piano from 23, did my grade 5 two years after. Then I paused for .5 year and did the grade 5 theory (since I started from scratch)... and then paused another .5 year and did my grade 7 at 27... If I can pass my grade 8 exams this year, I will have spent 6 years on piano

So it is possible! In fact I have limited time that I can work on the piano, because I am working full time, and I have this and that job (financial markets) related exams. Sometimes I even have to stop piano lessons for half a year. But when I can concentrate on the piano, I work decently hard too!
Alright, I sound like bragging now, sorry.

Anyway, good luck to you!
Cheers,
Tannie