How do I make an online T-shirt business?

I know I have to get a domain and web hosting. I just need to know how you actually sell the t-shirts. I am not interested in making and shipping the t-shirts from my home, so are there any companies out there that manufacture and ship the t-shirt to the customer without me having to do any of that work.
Thanks for any info:)

without doing market research and writing a biz plan, do not do so

i know of no on =line shirt shop earning a profit