Migrate

I was wondering how do I migrate Fancy Product Designer onto my website to put it on one part of the website and add my T-Shirts to the other part In case they don't want to design a t-shirt they can buy one. All of the video on youtube is so outdated. I'm new to this. And I have following your guide to the letter of the things don't work. It would be nice to have a simple guide that will start from A to Z that will tell you about the setting, the only it does is start with creating a product, it doesn't tell how to set up your website with Fancy Product Designer. I have never been so confused in reading this guide.  everybody doesn't have a lot of computer knowledge but if you explained it in simple terms we can learn. Thank you