All great advice here. Here’s a little more. Think through and prepare for the lighting. Stop in to check out the lighting and say hello.

Google planning a tattoo photoshoot and tattoo photography lighting. You don’t necessarily need equipment, but you do need a plan. The plan may be to shoot the subjects sitting by a window or it might be a cheap ring light, LED panel, etc. Be cautious with pop-up flash as the light can be a little harsh, maybe look at modifiers to soften the light a bit.

What rights did you grant in this particular instance, especially with regard to syndication?

This article shares some useful information on syndication starting where it says: The syndication agency I started with was…

https://petapixel.com/2019/01/19/the-pros-and-cons-of-syndicating-your-photos/

Lots of fluff upfront, so I’d skip ahead.

A flash drive is cheap. You could deliver their photos on a drive and then you’re done.

Adobe Lightroom also supports tethered shooting. Capture One seems to be the tool of choice, though.