Breech baby?

I’m currently at week 35+ however during my last checkup, my baby is still in breech position. I’m a FTM. Googled and saw some causes could be baby have birth defects that’s why baby doesn’t turn head down. Is that really true? How common is it that babies are in breech position till they give birth? Will breech babies delivered via csect still be healthy? #worriedfirsttimemom