I'm going crazy because I want to start an online merchandise store for my artwork, but when I do my research all I'm able to find is ways that I can make websites and put my stuff on it to sell. That is all fine and dandy, but I REALLY JUST NEED SOMEONE TO TELL ME HOW THEY GET THEIR STUFF PRINTED ON THE MERCH. That and where do they get the mugs/bags/phone cases that they print their stuff on??? How do they get them in bulk? When a customer wants to order something, do you pack the item and ship it yourself? HOW DOES IT ALL WORK?

Please please help. I feel so dumb because I feel as if everyone else thinks this information is totally obvious. I've been dreaming about starting an online store forever and it is time to take action. I have procrastinated too much due to not knowing how to go about it.

Thank you to anyone who helps me!