Your main limitation is the hardware: a dual-core Celeron with integrated graphics, 8 GB RAM, and Windows 10. That setup already struggles just running Windows, and adding MTA on top pushes it past the breaking point.
You can try closing everything except MTA to claw back a little performance. But honestly, even my entry-level i5 with integrated graphics 13 years ago couldn’t handle MTA properly. If you really want to enjoy the game, I can point you to some cheap but capable desktop hardware on eBay.
Another option might be reinstalling Windows in the LTSC variant, which is lighter. Linux could perform even better, but I’m not sure how well MTA runs there, so the benefit might be limited.