Hiya
I've been on MTX since May 2010, was on the tablets to start off with then switched to the injections last September.
I think the thing you have to realise is that MTX will affect everyone differently. There are people in this group who take 25mg a week with no side effects at all, and then others who have to come off it at 10mg weekly because of the side effects.
The best thing you can do is to try it and give it chance to work. Remember that even if you do get any side effects there is a good chance that they will only be short term and will soon stop. Also folic acid...what dose are you on? Do you take it daily or weekly?
When I was on the tablets my skin cleared up almost completely. It was only when I swapped to the injections that it started to get bad again and that was only because they put the injections at a lower dose than I was on with the tablets. Hopefully now my injections have gone back up to 20mg my skin will clear up again

On the subject of alcohol, you will get many conflicting pieces of advice, only you can decide what is best for you. Personally I do drink alcohol. My consultant said that as long as my blood test are ok and I dont drink on mtx day or the day after then it is ok to drink, but only the recommended weekly allowance!
Good luck
Lisa x