I had my hands in the trash only for a bit on the top portion of it not all the way in what can possibly happen if i were to eat french fries but i forgot to wash my hands from touching the inside of the garbage and there were cups straws etc?

Probably nothing: There is always a risk of eating a contaminated particle of debris or bacteria from the can. The common culprits are viral causing nausea vomiting and are self limited. Think of a cruise ship virus you get sick from the buffet handles and door knobs etc then you put them in your mouth rub an eye etc. I doubt anything will happen to you. That's part of stomach acid, to kill particles