Your best bet is to find the tattoo artist that has a style you like and is capable of completing the work.
Once you've done that then you can ask then to design a sleeve for you...
They'll do a good job because you picked a good artist, it's their own art, and they're getting paid.
Advice costs 0fg, tip appreciated haha
This, 100%
Go into your local shop, look at their portfolios. If an artist that suits your style is there, ask to set up a consultation. If no one in the shop fits your needs, go to the next one