Having problems with texture quality in my fivem server

You may find this useful:

[How-to] Optimize texture size | Fixing oversized assets | Bring any texture dictionary under 16 MB physical memory - FiveM Resource Development & Modding / Modding Tutorials - Cfx.re Community

OneSync infinity is recommended and you can turn it on from Zap panel I think.

OneSync ‘Infinity’: how to use it - FiveM Announcements - Cfx.re Community

Stick to Zap until you get some experience then you can search the forums for host recommendations, as well as different panels but may not be as user friendly as zap.