I need help making a character select menu!

So i want to achieve a little something like this:

Is that possibble, and if so, can you tell me how? Cause im fairly new to programming, I’ve been coding for almost 2 years, but I still feel like a noob. And I dont really know how to get better at this point. Anyways, thanks.

This video here shows you how to make a shop and inventory is part of this: