Vacuum the interior. Remove the passenger seat cover. Replace what cannot be repaired. Purchase a decent set of floor mats. There's a "zip tie" fix for the piece of trim on the driver's seat. Driver's door handle may not be salvageable.
Check local junkyards and start replacing the bad stuff with better stuff, get a headlight restorer kit and after you got it looking better put some Laminix on them, but definitely give it a deep cleaning.
I am currently moving everything over from my GT to this (similarly but probably worse) base G8. That front door panel can be yours. The cubbie is dirty but a little elbow grease and she should look new. The handle is intact with no tears