study chess lines and stuff
What it take to get from 1800's to 2000 in blitz?

Wow, this is some VERY insightful advice!!! There is no magic secret obviously. Main thing is to just get better at chess fundamentals and your blitz rating will eventually follow.

It depends what your weak areas are.
Not all 1800s are created equal.
Figure out what's holding you back and study in that area.

Speed chess only gives you time to play the patterns and ideas you know very well. The ones in your long term memory that you've probably played over and over before.
So if you've hit a wall in blitz, to get better you have to stop playing blitz and work on regular chess.
If you've hit a wall in blitz but you haven't been playing very often, then you can pump up your rating maybe 100-200 points just by getting used to the speed, getting coordinated with your mouse, getting used to premoves, that sort of thing.

Any suggestions welcome I can also post some of my games if needed
If you hit flat, change playing/ learning style. May be your tactical thinking stop with short line( due to playing too much blitz).
Stop blitz and play tactic or longer game .But those longer tactics wont help your blitz immediately, it takes considerable time to change. Make better time management, to spend more time in critical position( where you need to apply longer tactics).
For example, you are unlikely to outplay another 1800 by 2-3 moves tactics, but 4-5 moves tactics will help.( To think deep tactics, think only 3-4 critical tactics per game but very deep).
It is just example, other areas like endgame / opening studies may also need to improve like that.
Any suggestions welcome I can also post some of my games if needed