3DMaughan

New to FDM printing. Working to get this Oveture PLA Professional filament to print on a JGMaker Artist D Pro. I think I'm really close. Can someone tell me what causes the poor layer lines on the back and it's worse on the back left corner? My uneducated guess is the position of the part cooling fan. Filament is drooping because it is not cooling fast enough for this overhang. Also anything else you might notice from the pictures. Thanks.