How to upload a pcture ?

[LYLYY8888]

hello,dear ,Can you help me add some website elements? I will pay you

Website Examples   ：   https://mycustombrickfigures.com/

Website Features  

I am a character customization website. When I click the Customize button, a window for uploading photos appears. After the buyer uploads the photo, he can pay for the purchase.

The pictures are shown below