I have trained in acrylic, gel, silks/fibreglass and "tip&dip" but from choice now only offer l&p (acrylic) and gel. Of the two, I find l&p more robust and I have quite a few heavy handed clients for whom gel just doesn't cut it. I guess the split is about 85% l&p 15% gel.
I trained in gel first but soon found I was turning away clients as people were ringing up for l&p nails, and not prepared to give gel a try. So after about 8 months I trained in l&p as well so I didn't have to turn any work away at all.
hth
Oh, almost forgot to say, I think the systems are very different to learn, neither is easy. If you are looking for "easy" then I really wouldn't choose nails as an option lol, there is SO MUCH to learn and most of us will probably have felt like throwing in the towel when things don't go right, or you run into problems in the early days. You need determination and perseverance, in my opinion, to make nails your career. Personally I've been passionate from the word go, totally hooked, and so that spurred me on. Good luck with whatever you choose. xx