First things first.
Learn what skills you’ve lost, and look at the new skills available.
Yes over the years some skills have been removed and replaced with multiple new skills.
You’ll have free skill points available from the skills you lost.
Second, don’t fly anything you’re not flown in a while. Many ships have changed and old ship fits you used to use may no longer be the same. I did this, and lost the ship as didn’t notice half the fit was missing due to these changes.
Third, don’t pay for permits or ransoms, its just bully tactics. Paying this just feeds them.
Fourth, learn about the Trig/Precursor faction, as they pop-up all over EVE in difference states (invasion, emerging conduits, and roaming recon fleets), they can be deadly, but also fun.
Fifth, find a good group of players to fly with, and then think about joining a corp when you’re ready and not when they are.
Any questions just evemail.