I agree - this type of fight-focused style is quite common with 18-25kyu. I wrote a bit about it in the first 2 sections of this 19x19 FOR BEGINNERS article - see if this helps:
The 30 words or less version is - wait until your stones are just settled(1) in one area and then tenuki(2) and play the biggest move on the board for that stage of the game(3)
CAVEATS
1 - you have to understand what it means for your stones to be settled in one area
2 - you have to have some understanding of the right time to tenuki and the best place to do so
3 - you have to understand the shifting priorities of the various stages of the game to see what the “biggest move” at that point might be.
good luck!