Brilliant, thank you. I've been reading about this stuff and it sounds so much easier than the usual method. I'm sure I can manage with stuff we have at home if I can't use it for whatever reason.I bought something called "Second Skin" (there's other knockoff brands which are great as well), which is a wound plaster specifically made for tattoos. I bought mine off Amazon. Ask your tattoo artist about if you're unsure about it but I personally would never go back to regular tattoo aftercare with the painful scabs and the blood plasma everywhere and the Sudocrem etc.
For one of my tattoos the artist applied it directly after and I left it for about a week; the other wasn't happy about Second Skin (he's old school) so I applied it myself at home by cleaning off the Vaseline thoroughly with soap while not scrubbing (!) the skin and then putting on the wound plaster.
It's gonna look a bit gross because the wound fluid will collect under the bandage, but it's actually really good for the wound to have that plasma there as it promotes healing. And it means your tattoo will not form scabs that might peel off and take the colour with it. All my tattoos I did with second skin are super crisp and healed beautifully.
The tattoo might be a bit warm to the touch, but shouldn't be hot - a bit of warmth is normal from the healing, but hot indicates infection and might need antibiotics like any regular wound.
Edit: forgot the best part - you can shower immediately, and without the faff about drying off and accidentally ripping off the scab as well!