Personally, I find blitz is less about pure tactics, and more about making and enforcing a plan, and then the tactics stem from that. A lot of new blitz players will get into the middlegame and not really know what they should be looking for, especially when there simply aren't any tactics in the position, and that's where having an opening you know the rough middlegame plans for comes in handy.

For me, as black I play the Pirc or the Czech Benoni. Generally, I know that I'm going to be pushing on the kingside once I've closed the position, so I go into it having a clear plan and largely sticking to it. If I blitz those moves out, then suddenly I have more time when I get to the critical position.

I'd compare it to a set play in a sport (e.g. rugby, or American football). The attackers have rehearsed a move to break open the defense and gain an advantage (opening/middlegame strategy), but also need the ability to improvise when they spot a defensive error (tactics), which they can then convert into a score (endgame)

Hopefully that makes sense -- feel free to ask if I've been unclear.

Well you’re doing better than me. I’ve been casually playing for 6 years and 1350 in daily is my peak lol.

For me personally, I find Rapid 10 min games are a good in between for being able to manage your time and also perform the necessary calculations. What’s your Rapid rating out of curiosity?

Also you’re using chess.com I assume?

But yeah not that I am qualified to answer your question but I like to do a set of puzzles as a warm up before I start running through games. It seems to help me get into that tactical mindset and I can spot things quicker.

Where do you play?

The answer is not going to be to play more with time controls but playing long time controls and spending time (maybe years) thinking deeper in lots and lots of different positions until you can calculate well then you will be able to speed it up as you have a lot more knowledge of the positions you get into.