any tips on digging the hopper? it's a bit daunting for me. I was hoping to have someone else dig it but they're flaking so i think i'm just going to do it.

https://imgur.com/a/qvSC4fN

i have the pool excavated to the shallow end depth.

would it be best to dig the 12x4 deep end hole first, then mark lines from the corners to try to get the slopes right?

the multi angle trapezoid shape is whats giving me hesitation. if it was just a ramp the full width it'd be a lot easier. i assume it has to be fairly accurate as the liner is probably cut this way?

anyway, hopefully i'm over thinking it and it makes more sense once i start digging but any tips would be appreciated.