I don't have 1 support Champion as of right now and since she is going on sale and I have some RP saved up. I was wondering if I should get her or not and is she fun/easy to use or hard?

She's amazingly fun to play, and pretty good. I may be biased because I love her to bits, but I'd say go for it.

YES, GET ZYRA. She is so good at support and getting your adc fed, plus her ult is such a game changer.

um.. she's pretty easy to use, and very useful as a support. She goes well with any ADC, and is countered by only a few. She works really well with AoE team comps and helps stop dive comps (a bit). She is well worth it.

She's great in mid and bot lane. Just be sure to land the snares (E). They are what determine if your teammate will escape or get the kill. And be careful on when you use your ult. As the others have said it is a great game changer and critical in teamfights.