Hair Cut Help!!

So I've had long hair all my life, I'm plus size so I thought it looked best. I'm also 5'8 and live in the south, so it's getting HOT and humid fast. I'm beyond tired of my hair now that I'm a mom, I hardly have time to fix it and I'm thinking of a long bob... do y'all think it'd look good on me or make my face look fatter?? Also first pic is me, second is the cut I'd want. I'm keeping the same color