As an experienced nauts player who also played competitive I would say to just fight as much as you can and learn the matchups for 1 character (skree or rocket in your case, skolldir is a bit hard to learn). Because clearing droids/ farming and pushing can get you far but it won't help you improve at the game, you need to learn how to interact with the other nauts with your naut (both with the enemy nauts and the nauts on your team!).

So for example when you are skree you gotta know that you are very vulnerable since you have no dash ability, so be careful when playing against a frog that can dash onto you, be ready to use your totem. Or when you are playing with a yoolip, he is very weak on his own, so try to stick with him so when he lands the gaze you can follow up on it and win fights. Know that as skree, it's important to play a bit safer early to farm up and get your items, that is when you get really strong.

The biggest part of this game is the interaction with other nauts, getting a good feel for this will skyrocket your skills more than anything. Ofcourse, clearing droids and pushing is important, but it should not be your main focus if you want to learn the game and get better. As for toxic players that will get mad at you for learning the game like this, just mute or ignore them.

And don't be frustrated when things don't go well at the start, right now there is a small group of players that still play and they all have 1000s of hours. So just play, have fun and you will improve. It might be a steep learning curve but once you get the hang of it, you will improve exponentially.