My Urologist asked me to keep to bland foods for a couple of weeks following surgery, and that's what I did. I had lots of soup. He also suggested I eat a half dozen or so small samplings of food and not three large meals each day, for the first month - to give my bowels and other organs a chance to deal with the trauma/change. I had a good appetite from the start, before leaving the hospital (which, by the way, offered excellent meals!). I was also asked to get a stool softner and to take it twice daily - and in the month since the surgery I've not experienced any difficulty with BMs.
I was cautious getting in/out of bed the first week - because of the catheter, the incisions, etc. I did this solo, so having someone else around will be very helpful. Rollin/out of bed, Easy does it. Having the catheter in you is a plus at that point, not a minus - at least that's how I approached it. My catheter was in 12-days. It was also uncomfortable for me to sit in a chair, when I had the catheter in - my butt was sore. Once the catheter was out, I could sit all I wanted.
Let your body take over, decide when to rest, sleep, etc. Get up and walk though, in the halls of the hotel - from the get-go.
about alcohol: My Urologist suggested I avoid it, because it would weaken my control over the bladder. After a month I've started having a glass of wine, a couple of times a week. I drink caffiene-free Diet Pepsi, water and some juices. Lots of water, that's what you'll probably be told to drink - to flush the bladder and blood, etc.