If you can drink beer, then the problem is not the alcohol, but the grape alcohol.
If you can drink beer, you can probably also drink whiskey. Try that. Also, you can get higher alcohol beer which should be easy to get drunk on. Try one which is 6-7%.
You can be yotzei purim with beer or whiskey. (IIRC there may be an opinion which wants wine, but it is by no means the dominant opinion.)
Pesach is an issue.