Hey, welcome to Epicski, SoonerCrew! And welcome back to skiing.
There's a pattern developing here, and I'll add another voice to the same advice you've already gotten. You've heard it from instructors and non-instructors alike: take a lesson (or several), and don't take lessons from your friends. Find a respected instructor and sign on.
You have a great opportunity right now, and one that you won't have again: You have the chance to start out right.
All of your old skills will come back, as soon as your confidence in them returns. And those old skills will still work, even though today's equipment can do so much more with so much less.
But those "old skills" include both bad habits and good. Since you've been off your skis for a good while, it's easy right now to "groove" the habits of great, contemporary skiing, and to eliminate bad habits. You get good at whatever you practice, so unless you just want to get "good" at the same old bad or outdated habits, take a lesson, first thing! (I do agree that it wouldn't hurt to go out on the beginner hill, or something at least several notches below what you think you used to be comfortable on, for a run or two. That will give you some information that your instructor can use to start you out right, and get you into the right group. For private lessons, it won't hurt to take the lesson right out of the chute.)
The point has been made that it's asking a lot of friends to expect them to teach you on their own valuable ski time. But even they love teaching, there are very, very few skiers on the mountain--even among those whose friends think are "good skiers"--who have the eye or the understanding of good ski technique to teach it. Fewer still have the experience with teaching methodologies to teach it well, even if they do understand it. The short of it: you will reinforce bad habits, unless you find a good, current instructor.
If your friends haven't had any good coaching in a while, after a very short time, you'll be able to give them good advice!
Whatever you do, though, please stick around here at EpicSki. I'd love to hear about how it goes. Maybe we'll meet on the hill sometime.