Hey all, like many of you I started playing chess again after watching that Netflix show. The hype around Pogchamps drew me further into the chess stratosphere. I found the Pogchamps coaching videos on youtube especially helpful.
To date, I've had no tournament experience or formal chess education and only played a few games occasionally in grade school. I decided this time to treat chess seriously and make it a lifelong hobby. Between the Queen's Gambit show and finding this study plan, I was watching tons of chess youtube videos and practicing tactics everyday. I'm 7 weeks into the study plan now with weekly stats and commentary as follows. This is sort of 8 posts fitted in 1. I will try to update on a weekly basis for the remainder of the 12 weeks.
Week 1 (starting base)
Games: 105
Puzzles: 2089
Puzzle Rush: 25
Rapid: 1413
Blitz: 1042
Before the 12-week study plan, I'd started off having spammed a lot of puzzles. Rapid rating was inflated from playing my friend three times in a row as my first ever games.
Week 2
Games: 120
Puzzles: 2075
Puzzle Rush: 25
Rapid: 1381
Blitz: 1132
Rapid rating is dropping to actual playing strength. My biggest issue in games were blunders and time.
- Blundering one-move knight forks and back-ranks
- Flagging in both 5+5 and 15+10 games (!) 
 
Week 3
Games: 199
Puzzles: 2067
Puzzle Rush: 25
Rapid: 1384
Blitz: 1159
Rapid has stabilized at playing strength. I continue to blunder one and two-move mistakes, miss chances to mate, and lose on time in 15+10 and 5+5 games. On plus side, got a 99.1 accuracy game in the Caro in week 2.
Blitz continues to increase to actual playing strength (regardless of whether I am actually getting stronger).
 
Week 4
Games: 228
Puzzles: 2144
Puzzle Rush: 25
Rapid: 1382
Blitz: 1235
Nice jump in puzzle rating. For the next several weeks, I cannot break 25 in puzzle rush. Too hard. However, I did start getting 25 or close to 25 more often.
Did well in rapid during week 3, even though the ratings didn't change. The games I won, I had good attacks going. The games I lost, I had developed big advantages before blundering (better than blundering in drawn or losing positions I'd say).  
Week 5
Games: 312
Puzzles: 2213
Puzzle Rush: 25
Rapid: 1454
Blitz: 1322
Huge jump in rapid and blitz. I played solidly and did not feel in trouble at any time in the rapid games that I won. The rapid games I lost were due to unsound sac and blundering a knight fork.
Week 6
Games: 411
Puzzles: 2208
Puzzle Rush: 25
Rapid: 1461
Blitz: 1348
Same story as week 5: won games were were solidly played, though several games this week were won with opening traps or mistakes of the other side. My lost games were me blundering tactics. Hmm - check the opponent's threats!
Starting this next week, I started working with a coach. Learned about concept of weak squares and how that can inform your game plan. 
Week 7
Games: 481
Puzzles: 2246
Puzzle Rush: 28
Rapid: 1458
Blitz: 1364
Finally broke 25 in puzzle rush!
I had started out experimenting with King's Gambit in weeks 1 and 2. Got myself in difficult positions where white had to find precise attacking plays and sacrifices, while black could play "normal" defensive and developing moves. Felt like as White I was rushed and pressured to "do something." In weeks 3-5, I picked up the London which gave me better results than the King's Gambit.
However, in week 6, I started learning and playing the Scotch game here; unsurprisingly, lost both Scotch games in week 6. Although the London was comfy, I did not want to pair that with the Caro as my opening package and turn into a one-dimensional player. Not fearing rating losses, I opted to open up my game and focus on player growth.
In week 6, as a "new" e4 player, I realized I do not have a good response to the Sicilian or the French. But, I resisted going back to London.
Week 8
Games: 499
Puzzles: 2244
Puzzle Rush: 30
Rapid: 1466
Blitz: 1418
Puzzle rush to 30! I tried hard to repeat 30 or break it, but could not. Think this is my new puzzle rush plateau for a while.
Crushed it in blitz this week (+54).
Won some e4 games as white and some Caro games as black. Funny enough, did not get to use Scotch so that remains a very shaky and new opening for me. I lost two rapid games due to blunders: one was a pinned pawn that I thought was protecting my bishop, the other was losing rook to a bishop from downtown. For both of these, I needed to visualize my opponent's likely captures and threats.
This week and last week, my coach had me work on bishop vs. knight endings (and vice versa).
Up until this point, I can pinpoint very few games which were lost strategically. Everything's being lost due to blunders or time. I am feeling lost as White (using e4) and Black (versus d4). Compared to those, I feel much more comfortable playing the Caro, in no small part thanks to ChessGoals' free Caro videos on youtube!
 
March 8 update:
Week 9
Games: 526
Puzzles: 2239
Puzzle Rush: 30
Rapid: 1446
Blitz: 1452
Went 2-4 in rapid. Losses were a mix of tactics and strategy. In e4 game, opposite castling (me queenside), I tried to advance my queenside knight to the center and left my king with insufficient defense; later dropped piece to a tactic. In another game (winning), hung a mate in one to his lone queen when auto-moving my king in response to check. In a King's Indian Defense game, did not know how to proceed with my winning kingside attack; instead, lost wind and lost to a tactic in even endgame. Finally, in a Caro game, got excited to win a piece with tactic, but did not consider that his ensuing attack would be brutal and winning.