Don't beat yourself up. As far as first guides go, this is on the 'exceptional' side of the spectrum.

I don't like most of your situational items; I think abyssal, wota, and RoA suck on zyra in any situation. If you want more MR, consider QSS. I think GA is way more viable as a situational item than wota etc.

Since it was named wildfire zyra, I thought liandrys would be core. You may be a bit heavy on the defensive items as well, but overall this build will work totally fine (but there may be some min/maxing to do in the runes/items, but who cares because zyra mid is super niche and out of the meta, that being said you can still do work with her mid)

Really thanks for your respons and I will see what I can do

In your Rune section you missed twice to write "Greater ... of ..." so the code doesn't show the Tier 3 Runes. I think you can mention leveling Grasping Roots at level one in some situations and maybe you may mention alternative Seal Runes ( Greater Seal of Scaling Health) due to the changes at Patch 4.5. Personally I would say Void Staff is always core regarding the high amount of AP the item gives itself for low costs and in many cases it's even more effective than one of the "120-AP-Items". Apart form that great start, good luck!

Edit: Your guide title is a bit short so you might consider calling it "Wildfire - A Guide to Zyra" or "Wildfire - Zyra Mid Lane", idk.