I had one about 5 weeks ago. There are hernia ops and hernia ops, both in the sense of where your hernia is (para-umbilical for me) and what they do to fix it.
Advise as to when you can do what tends to err on the generous side (quite sensibly). I'd say for a week you're next to useless, partly for the discomfort – surgery itself might not be that sore but you feel pretty bruised and bloated, and partly because the anethestic buggers you up quite a bit (and knocks your immune system back a bit so you are a bit lurgy prone too). For the first week I'd say being driven somewhere for coffee and cake, then driven home again was the limit of my abilities each day.
For my procedure I was advised not to drive for 2 weeks which proved about right, up til then just being a passenger was harder work than you'd think, You do more work with your abdomen that you'd appreciate when you are travelling in a car and you'll never have such venom for traffic calming measures. "F@%king Humps!". I was also advised to avoid lifting,shifting, pushing, pulling for eight weeks, although I've been steadily getting back into lifting a shifting (and pushing cars through the snow).
Keep in mind that if you've been advised not to drive you might find you're not insured to do so as a result, you certainly aren't insured for the first day or two after a general anesthetic.
However…… Although keyhole is the preference it won't be clear until you are on the table whether its viable, in fact it won't be clear until they go inside, so what can start as keyhole can turn into good old fashioned butchery, especially if your gut accidentally gets poked, and you need to sign consents for both types of procedure. The recovery for that is a lot, lot longer, you'll be kept in the hospital for a few days for starters (rather than walking out at lunchtime) and the care you need to take throughout it is greater too, perhaps even being advised not to raise your voice!
"F@%king Humps!"
Make preparations to lay off activities for as long as you are advised, don't find yourself breaking the rules because you've given yourself no choice, or because you're bored. The first repair is the best repair so don't let impatience bugger it up, as it just leads to nastier ops and less successful repairs.