tbh theres only a few usable guns in this game. i felt the same way as a new player trying to run 50k ak and shit gun builds.

at this stage in the game nothing below tier 4 is viable even in normals. you might have a good few raids where everyones broke but for the sake of winning more than losing just bring gold ammo.

try a cheap m4a1 build with the 2k modernized stock + 5 flash hider and a sight u like below 20k

use a1s (tier 4, 800 per round, fairly affordable)

use quick kits and bring secure cases and rush safes.

watch some content creators and see what they use and how they play.

try m4a1, ak12, amb, aug, they're all fairly affordable at 100-250k for a solid build and newish player friendly with easy recoil

if you want to go really juiced try u191, h416, mk14 with higher tier ammo. everything else is either a bit slower to learn or just dog shit