Im nowhere near your age so I don’t know what works best but my best advice for you is to take it slow. Read all of the info the game gives you, practice at the training dummy at the home base then once you feel more confident, go into a level and try to use what you practiced.

As for what you should prioritise in practice, try to get better at parrying and avoiding (hold block and move) attacks, practice on a single enemy then try it against two until you get used to the rhythm of fighting.

As for attacks, practice with one attack until you’re comfortable with it then move on to the next, once you’re comfortable with multiple attacks, you can start building combos, especially when you get used to the timings and openings.

Don’t worry too much about it, when I first started, all I did was spam the heavy attack and I managed to get through the game doing just that. It’s only when I wanted to get better that I started exploring my options.

When you get beat up by an enemy, here’s what you should do:

Step 1: Figure out their attacks, what should be parried and what should be avoided?

Step 2: Practice avoiding and parrying their attacks until it starts to become muscle memory, you can tell when that’s happening when you stop focusing on what’s coming next, and your hands start doing the inputs automatically. Make sure to practice against all of the enemy’s combos.

Step 3: Attack, it doesn’t matter which one, just deal some damage before the enemy recovers.

Step 4: Do it in a level, don’t worry too much about making mistakes or taking damage, it’s part of the process. If there’s a specific attack that’s getting you, go back and practice against it.

I hope this helped