Having guilt abandoning/putting aside a language I studied for so long

long story short (also I have ADHD), I’ve studied Japanese and Korean on and off since middle school and high school, in levels I’m around N4/N3 for Japanese and beginner intermediate (?) for Korean.

I don’t know what happened but ive lost that spark/motivation to study Japanese (and I bought so many Japanese books 😔)… im 23 and my parents are polyglots and they’ve told me just stick with 1 language at a time.

ive been wanting to study mandarin and Korean (because I still haven’t lost my spark for Korean) and mandarin because I just find a lot of the medicines, and media, books and culture so cool.

im confused if this is just my ADHD searching for a new dopamine hit by starting a new language but I hate that I’m so indecisive..

a lot of people told me to just get to N2 and then use Japanese to study mandarin/korean, but I’m so confused I don’t know…

has anyone just stopped/put aside a language they studied for so long to start a new one and never looked back? im 23 and I feel so old and that time is passing by and I want to really make a decision.. any advice ? please and thank you