keep playing. imo after a few thousand games you should be able to start replaying the game in your head. once you can replay a game in your head then you should be able to start playing blindfolded. then once you can do one blindfolded game consistently, you can move to multiple boards blindfolded. short answer you need a minimum of maybe 10k games or more if you really want to be able to play and win blindfolded
Chess Notation
Find a book or an article containing a game. Find a chessboard, real or digital.
For a start, here's the most famous chess game ever:
https://en.wikipedia.org/wiki/Opera_Game
When you think you are comfortable with notation, there is also a game on chess.com:

Algebraic came in the 80s? A little before? Its correct for the period, the 50s and 60s used a horrible, very hard to use notation based off original positions.
the current is much more efficient. Its really just coordinate to coordinate on a grid, with a slightly weird but makes sense once you get into it shorthand. Try writing it down as if at a tourney... if you write c5xd4 type on every move... with the clock ticking down and moves flying fast... or you can say cxd because you know there isnt but one thing that can mean... anyway, the current is basically location to location notation with redundant info removed.
Couple of things helped me. Playing through GM games OTB, constantly using notation to move the pieces round. Then during play and doing puzzles I think in notation. So when I'm calculating, I thinking Queen takes d5, Pawn d4, etc. Its hard at first, but gets easier.
Algebraic came in the 80s? A little before?
Yes, a little before. There was a Paris-Pest correspondence match in... wait for it... in 1842. In that match, the "descriptive notation" was used - even though the Hungarian team considered it outdated. In 1842.
I did find the "descriptive notation" in TQG extremely confusing, I think we're more used to "algebraic notation" here.
It was correct. In the USA (and I think in the UK also) they used the "descriptive notation" in the 1960s even though the whole world have completely forgotten it by then.
I just started playing chess recently and darn am I addicted. Just wanted to ask if there are any tips on how I can improve my understanding of chess notation. Also, I would love to learn how to play chess blindfolded, and if there are steps that I can take in order to achieve enough skill to be able to play a decent game blind.
P.S. I am from the Queen's Gambit crusade lol.