buy hybrid. Trek, Giant, etc. take your pick.

Forget the suspension nonsense (I skimmed this thread and i think i read your budget $500-$700.)

In that range you are going to buy a mid to lower (maybe) hybrid.

Buy some good gloves, bibs or shorts and ride to your heart's content.

A Trek FX7.3 is likely in your price range. Giant may buy you a bit more.

All the best!