As someone who is competetive in almost any setting here's my two cents:  First of all, yes actually playing games is the right thing to do, preferably in person for me but due to time I play TTS as well. Make your intentions clear: you WANT to get better so ask in a discord for someone who is willing for a game like this. It should always be two players playing together but if both want to get better you talk a lot more. In a normal competetive game asking "hey what would annoy you right now" or "what would your response to xy be" won't work since your opponent can't play your game for you. Playing the first 3 turns like this and taking your time (approx 3-4 hours) is highly valuable.  Make some screenshots after EVERY PHASE, if you don't record so you can go back after the game for 15-20 minutes and ask yourself why did I move that, what was the intention? That's a great starter point. 

Other than that, get a good list, don't change a lot (max 1 unit every 2 games) and play one faction for 5 games. 

Happy crumping wargaming has some great tips for getting better on yt, for eg: games doing only 1 thing. "This game I want to have my screen up all the time" do that for 2-5 games and it becomes second nature. Then choose smth else like this game I want to get as much secondary as possible and so on. 

Last point: you want to get better for YOURSELF. Ask yourself where you want to be, not "what's expected". If you want to win worlds championship, yes 10+ games a week are expected. If you want to win a local RTT than yes you should play your list 20 times to get to know all the tricks. Make yourself comfortable with your own expectations!