Candybooru

Amg.
This is so adorable.
AHMYGODDD <3

Tip 1: Learn to crop images (remove white space), please.

Yeah it's pretty cute, as a beginning artist, that you would have drawn this, and it's great you're willing to accept criticism to improve. Try and get a lot of practice drawing people in different positions and compare to photos or real life. Study the anatomy to get a good feel of proportions. There's heaps of books, tutorials, youtube videos and classes that can help a beginning artist how to draw human shapes.

Here are some br0tips on how to get better in not such a big time:

first: When you want to draw something big that came up in your mind and want it to get on paper as good as possible, sketch first. you´ll think at first, how can something like this get better? Well, that´s the part where you better get a pen which is like an felt-tip in black. You can choose what you want but I prefer to mace it good the first time to use it. so, you see your sketch and want to start already. BUT DON`T because you´ll might at first try the sketchy looking lines which makes it look very bad (might depend what you´re drawing). So make it look smooth. take it slow. You have much time on something like this unless you got so much work like an teacher in high school.
After you´re done, erase the lines you made of scan it on a scanner and edit it in Photoshop or something. Gimp and Paint.NET are fine too if you know how to use it.
Alright time for the color bucket. choose the color and fill the white spaces. Is there an an hole on the line just choose the color of the lines and close the hole with an fitting brush. Save the picture (to loose nothing) and start trying to shade it. I´m on myself not really shade but you can google around and find ways to shade in a easy and good looking way. If you´re happy with the results just save and upload where you want it.

Tl;dr use google on how to draw.

Square shoulders are square. You should try to draw the scarf more.... flowing I guess? A quick glance at Mike in the comic can show how the folds in the scarf look.

It was a pleasure to do that!