phrasal-verb
work on yourself
prinyatʲ usiliya dlya uluchsheniya svoikh osobennostey, privychki ili soznaniya
Meaning
to make conscious efforts to improve your personality, habits, or mindset
Example
He spent years trying to **work on himself** after his breakup.
On provel goda, pytayasʹ **rabotatʹ nad soboy** posle rasy.