First time buying electric tooth brush , any good recommendations ?

I’m 19 and have never been stressed so much about my oral health until recently , had my wisdom tooth extracted (severe cavity).
So I’m considering an electric brush.

Seen quit YouTube videos but price ranges were quite high (230-320 dollars ).

My budget is 60 dollars but I can be flexible on
it .

Also after how many days do I need to change the brush head .

Oral B i09 good or smart -7000

Please let me know .