@vivi you are just fine and do not need to lean something else
Your mind is free to design, when you learn something professionally then your mind is limited, that is how people teach today.
Most important element of art or design is the identification element e.g. If you see a Picasso painting you instantly identify it as a Picasso work. If you listen to a Beethoven music you instantly identify Beethoven as composer.
Your designs, if I saw new ones , I instantly know they are Vivi designs.
You do not need to learn anything professional, just design LOTS MORE!
I will create some new versions of your characters in software and show it to you, see if you like and approve.
Please Vivi just have Vivi thoughts, forget about professional training stuff ....