If anyone remembers Zombe fly mod that is exactly what I am looking for.
In short (I don't care about hotkeys) :
You press F to start fly mode.
You then press Q to go up and E to go down.
Shift is a speed modifier to speed up like 3x or 10x depending on settings/config.
That is all I need. Why do I not just use the creative flight? Or any of those Xray mods with flying features?
The flying from all the mods I found is similar to creative meaning that you glide in the direction you were moving after you have already let go of the moving key.
It's like you are always flying on ice whereas with the Zombe fly mod you would instantly stop when you stopped moving.
Well if anyone knows what I mean and knows a mod for 1.13 that can fly like I mentioned I would really appreciate it.
Thanks for reading, I hope you can help me out!