One thing I personally always need for bigger pieces is a way to control my values and since it might be useful to others aswell, here is a quick and easy way to check your values while you draw.
This piece is overall still too dark so there is more adjustments that need to be done but I hope this is useful to some of you.
I don't really do any kind of tutorial usually so let me know if there are specific things you'd like me to do more of :'D
Edit: This is specifically for CSP users. I have not tried this method with other software!