Hybrids are not that hard to learn. Some seem to be very complicated but with a bit of practice it is easy. I think you should began by learning few ones like:
-warped sonic 13-34 inverse sonic impulse (You begin your inverse sonic 23-12 but when your mod is in 13, you do a warped sonic... It may look hard like that but look video on youtube and with a bit of practice you'll get it
-middlearound reverse 24-23 sonic clip impulse (Like the first one, you start your sonic 34-23 and when the mod is on 24 you do your middlearound reverse)
-demon sonic (I don't know if you know this trick, cuz I don't really know your level but it is an hybrid, in fact it's a sonic 34-23 ~ (hybrid) twisted sonic 23-12, or twisted sonic 24-12 sonic clip impulse if you want ^^)
-neosonic 13-t1 inverse sonic impulse
-pass reverse 13-34 inverse sonic impulse
In fact, hybrid mean the same thing that normally, it is a mix of two things, in penspinning it's a mix of two tricks or more. When you do a trick and the trick before is not done, It is an hybrid. You stop the movement of the mod to begin another trick.
There is a lotttt of hybrids, as I said I don't know your level in penspinning but those are few ones that I think are easy to learn. Search for tutorials on youtube and once you understand how the mod have to move it is easy.
Like Neslux said, hybrids are a must in penspinning ^^ Combos look way better with them.
Take a look at Ognek's videos, he does really nice hybrid. ---> http://www.youtube.com/watch?v=roUY2bl5cBg it's the third one. Really good combo and it is fun to watch. In this video you can see ippei too who is doing really nice hybrids but with infinities. It's really nice too but harder I think.
I hope I've been able to help you
Good luck with hybrids and learning penspinning, if you have other questions i'll do my beat to help you