Improving doesn't just happen by playing games. Just look at our friend piroshiki. You kinda need to set goals consciously and work towards them. I'd recommend working hard on the basics; these will be important throughout the game and having bad basics will just limit or cap your growth. I'd look into and/or practise the following things:
- get a wired at least decent quality mouse and a good mousepad. This can make a big difference.
- practice aimbooster a bit. You don't need to be super fast or accurate with your mouse but it's convenient for you to be able to reliably click on units. I used to struggle targetting pikes or other units because I just didn't have the speed and accuracy for it. Once I got good gear and practiced a bit I felt much more at ease doing it.
- Make your hotkey set up efficient and ergonomic. I'd advice putting all the important hotkeys on the left side of the keyboard. Make sure you don't actually have to really move your hand around at all to hit hotkeys as that's inefficient. I used to hit control with my thumb and then the number with my index finger to make a control group, but that requires you to rotate your hand and stuff which is pretty messy. I practiced a lot to get used to using my pinky and changed the hotkeys so that shift + number creates the control group. This is much more efficient. There are a lot of little things like that which can really help you
- Practice actually using hotkeys. No more clicking on buildings or units that you want to train, only hotkeys. It's much faster.
- I'd recommend getting used to using the "select all of the same type" hotkey to manage your control groups. You don't have to move your screen that way, it's awesome.
- On the topic of control groups: use them, and use them in a consistent way. Barracks always on the same group, stables always on the same group, ranged infantry always on the same group, ranged cav on the same group, hand cav on the same group. If you just have hussars and nothing else don't put them on control group 1 where you normally put your skirms because that will end up confusing you a bit. I always put my hussars on control group 3, just like how I actually always put fast raid like units on control group 3 in starcraft or cavalry on control group 3 in sc2. Consistency will make you faster in the long run.
- it's actually nice to change control groups 6-9 to places that are more accesible on the keyboard, like the f keys if you can reach them or for example on the qwerty row.
- make sure you are consistently creating villagers and macroing well. Practise build orders against the computer to get a feeling for the villager distribution. Shitty macro will consistently lose you games no matter how good your strategy is.
You should try to nail these things and become a mechanical powerhouse. If your basics are good you'll have a solid foundation to improve a lot. As a bit of an anecdote, I started playing guitar at a pretty young age and the first thing I was taught was to get the basics right. I didn't play songs for the first months at all, I just practiced stuff on open strings and my guitar teacher insisted that I needed to get all the basics perfect. Some 15 years later and I'm still benefitting from the fact that my basic technique is pretty much perfect. My RTS basics are probably pretty good too, so I can for example do pretty well at aoe3 or get diamond in sc2 with little effort or tryharding just because I am building on efficient mechanics. I once played a friend in a 1v1 in aoe2, first time I played that game online and I actually stomped the guy just because mechanically I was doing much better than he was. I was literally alt tabbing to follow some standard build order I found online while playing and asking the friend what units I needed to counter stuff because I didn't know any of that, yet I still won. Granted that the guy is pretty mediocre at the game but it still shows how much basic mechanics matter.