Meaning of “take sth up” - Learner’s Dictionary

take sth up

phrasal verb with take uk us /teɪk/ verb [ T ] (past tense took, past participle taken)
ACTIVITY

B1 to start doing a particular job or activity:

I thought I might take up cycling.
TIME/SPACE

B2 to use an amount of time or space:

This desk takes up too much space.

(Definition of “take sth up” from the Cambridge Learner’s Dictionary © Cambridge University Press)