This is my first BUILD please help.

[JAZZCNC]

Excellent work and that machine certainly won't be walking across the floor.

On the drawings you show the motors connecting to ballscrews directly.! Can just recommend you think about using timing belts and pulleys.
They greatly help reduce resonance which acts upon the motors and can cause rough running and lower performance. On a Box section steel machine this is esp important for obvious reasons and esp if the tubes are not filled with sand or some other form dampening ~(expanding foam isn't much good.!).
You'll also get the benifit of being able to apply a ratio if you ever feel like more speed or need more torque.

I do this on every machine I build regardless of what material it's made from and on every Axis because the benifits far out weigh the cost and extra time.