My custom armor set is not working correctly

Hi, I was trying to make ice skates mod that adds ice skates(boots), earmuffs(helmet) and a scarf(chestplate).

The first problem is that I want the ice skates to make a player taller while wearing them(because of the blades). The only way of doing this that I found was to simply move the model higher, but idk if this would work in the actual game.

The second problem is importing the model to Mcreator. I tried to follow a tutorial(adding similar textures as entity texture and armor texture layer1 layer2) but when it came to actually adding armor, the original texture turned into this

Also, every time i save armor mod element with this texture, a message pops up saying "Armor needs to have a texture". I tried to choose random armor texture and save it but that still doesn't seem to work. It keeps saying "One or more of your main mod files did not compile properly" and I just don't know what to do

If there's anyone who could help me with this, I'd be very happy