I've pretty much finished making one myself and I've only simple tools. (Old ac tombstone stick welder, torches, angle grinderd, drill press and determination to learn lol)
I followed the euro global design but only did due to specific reasons in my situation. If you're planning on getting attachments go with whatever you're most likely to get. (Which will likely be skid steer!)
So that you get your angles right I'd advise you don't cut the ears off your bucket until you've got the quick attach kinda built. I often referred back to the stock bucket to make sure I had things right so when I rotate anything that's hooked on the loader it has the proper rotation. (For example you don't want to have your loader in full dump but find the bucket is only flat on the ground in said position!)
E.