Just be yourself, don't change your routine for others, i'm sure shoes or no shoes won't make the slightest difference, sometimes you can try ''to hard'' to impress, my bet is, hes more nervous than you going to your house, once the ''ice is broken'' so to speak, your be fine, alchohol is fine, but don't let it be the answer to you being nervous, it could give either the wrong impression, or spoilt your night
Dim some lights, some soothing music etc in the background, order a chinese/curry and job done, remember, the way to a mans heart is via is stomach?
Have a good night