Have to look after tattoos for like 3-4 days minimum if you don't want to wreck them.
A tattoo is a scar and at first it's basically a scab. You have to resist the temptation to scratch them and keep putting lotion on them. I use the unscented bepanthen and reccomend getting that.
And of the scab that you pick off will take ink with it for the first few days.
You also can't keep them wrapped, that whole clingwrap thing is just till you get home then have a nice bit shower and wash it.
Try to wear clothes that don't rub on it for a few days or leave it exposed and keep it moist all the time with the bepanthen.
If you don't follow this you still get a tatt, but you will increase the amount of touchup work required if any. I have mine touched up a month later to ensure they are perfect.
So basically it's your call brah... The better you treat it the better it will look, but if you need to do shit then you need to do shit.
Swimming also not an issue, just make sure you pat it dry.
Also unless on bone they don't really hurt, more irritate