How to develop plugin for clothing?

Hello,
I want to develop plugin for UE4 that contains 5 cloths and 3 colors. The user should be able to select cloth and color for the cloth for the hero.
I read a lot, but I’m still confusing. How to start and realize this?
First, I should modeling the cloths, right? Is this possible with 3ds-max software? And after that how can I import the cloths to my plugin?
Interfacely, I want to put menu in the toolbar menu from which the user will be able to choose one of the 5 cloths and other menu for the color.
Any suggestion how to start, define and put in order the tasks will be helpful!
Thank you in advance!