The common term is reinvent yourself or reinvigorate yourself or revitalise yourself.
You can say 'renew yourself.' if you make it clear from the context you mean the second definition below and not the first. 1 = start again, 2 = give fresh life or strength to.
resume (an activity) after an interruption.
"the parents renewed their campaign to save the school"
give fresh life or strength to.
"she would face the future with renewed determination"
Similar to renew are revive, regenerate, revitalise,
Note revive is subtlety a little different. We mostly use this word for example when someone has fainted, been knocked out in a boxing match/contest or is shocked/stunned/concussed after any trauma accident or boxing match.