Overall, and in regard to catch ability, they're just fine. We all made textbook mistakes when we started. Length of tail is a personal preference but there is a point where it doesn't work. We use the tips and shorten from the butt side to get the desired length. Tails too long have a tendency to get struck short, so keep that in mind while you develop your technique and style. Colors will also make themselves known as you fish your jigs. Lots of standard combo's are proven winners and as you look at everyone's pics you'll see the popular ones. Jig heads with a collar make the body section different and a bit more difficult to make good looking. I remove them. The minnow head is a winner for me but I always remove the collar before I begin to tie. I use about 3 turns of chenille for the body, and for sure stop before you go under the point of the hook and reduce the gap between point and shank. Using a Materelli finishing tool will let you hide your final ties to hold it together, thus eliminating the wide thread collar that you have now. 3 or 4 good turns of thread will hold things in place and a spot of 50/50 Sally Hanson's and lacquer thinner will soak in and harden holding everything just fine. Always start a tie with a tiny spot of Sally to keep everything from moving once complete. The jigs you tied will catch fish, and you'll make an improvement here and there until you are satisfied with them and they're loading the live well. Keep after it and welcome to the addiction, there's no turning back.