Sanity check, advice, feedback before my first tattoo

Hello!

I'm thinking of getting my first tattoo ever and would like some sanity check to make sure I'm not forgetting to take into account anything important and also any other recommendations you guys might have.

* About me: I'm 38, a dude, live in Germany and work as a software engineer. Professionally, a tattoo shouldn't be a problem.

* For the design. I've been wanting a tattoo for ages and always had a sci-fi theme in mind. For a few months now the idea in my head has gone from generic sci-fi to something Mass Effect-inspired. Will likely end up being a big one, like from my forearm up to my shoulder. The idea we discussed is basically 2 pieces, the game's main starship in my forearm transitioning to one of the characters as it goes up my arm on the shoulder. In full color with some background, more of a vibrant style than purely realistic. Pretty massive for my first tattoo ever but I kinda like the idea of going big with something cohesive.

* For the artist. Found her on Instagram and loved her style and previous work. There was a tattoo convention in town a couple weeks ago and had the chance to see a lot of other artists and also watch her work live. Of all the other artists I saw I still like her style the most so pretty sure there. Had a quick consultation with her today in which we went over the idea and a quick collage with images from the game for her to get what I meant. She's gonna send me the first draft in a couple weeks.

Is there anything you guys think I should make sure to ask or reconsider or whatever? So far what I forgot to check with her today and was gonna ask her is that if we could start with maybe the part on my forearm so if I end up not able to handle the long sessions or don't like it or whatever I at least end up with a smaller but still finished piece.

Sorry for the wall of text.