Hey Ashz!
Figured I'd take some time to give you some thoughts!
It probably won't surprise you that this map is 90% corridor, and I hate to say this, but it seems really un-fun. The terrain is all the same, the point is a blender set to "liquefy", and there's very little height variation. I'm sorry, but this map doesn't seem very fit for TF2. I created an imgur album to explain my thoughts
https://imgur.com/a/mOoUb
BUT! if you are determined to make something fun out of this project, I have a few recommendations, the primary one being studying the traditional king-of-the-hill formula for TF2. There are a number of resources for this; I would recommend UEAKCrash's video (
View: https://www.youtube.com/watch?v=7cZhJF4P2vI
) on the subject, which I think can help.
Humble beginnings, friend! Everyone has to start somewhere, and there's no easy way to learn all this besides just experiencing it first hand. Don't get discouraged!