Klonopin won't cause any harm unless it taken at a very high dose for a long time. Even then cognitive changes will disappear slowly when the drug is stopped but you are correct, .5mg will cause no "damage" as neither will 1 mg.
As for prozac. It's easy to stop as it has a very long half life(the longest of the ssri's). I have used it since 1992 and swear it helps but you must take it for a while as with all AD's. If you are sensitive to meds a bet 10 mg daily of prozac would be best. I won't worry about prozac and alcohol so much but skip klonopin and alcohol. Just pay attention and see how it goes. I drink and really notice nothing with respect to the prozac but never mix my valium and alcohol as it would make me too sleepy and I simply don't need it then anyway.
I hope you stay on 10mg of prozac for at least 2-3 full months to see how you benefit. That would be my sincere advise. If it doesn't help, drop it which should be fairly easy.
Love the Northwoods of Wis for camping, fishing, etc. PM me anytime. Alankay