Sadly I am not able to connect the Estlcam.
The typical pathway is to produce a g-code file from EstlCAM and then deliver to your control board using Repetier-Host. Make sure you’ve setup Repetier-Host and steup EstlCAM.
Also, my end stop doesn’t do anything
We need more information to puzzle out what is going on. If you wired your steppers for dual endstops, and the steppers are working, then the problem is likely not the firmware. You can send an M115 g-code from the manual tab on Repetier-Host to be sure. Look at the version number. Dual endstop versions have a ‘D’ in the verison number.
Endstops are only used when homing. How are you triggering homing? If the machine moves a slight bit in the wrong direction when you tried to home, then you have the endstops wired normally open. They need to be wired normally closed.