Before you get involved with Internet is there any local market for your product? That is to say, it is up and running, is there market success? The internet is NOT the be all end all but is a place to do marketing if THERE IS A MARKET and local success has been achieved. If you can't do biz in your own home town it is unlikely success will happen on the world wide web.
When dealing with clothing/textiles there are other considerations such as unique/new design (highly unlikely given the utter predominance of textiles used world wide). Quite possible somebody somewhere else has already "cornered the market" for that "design" as there are only so many ways one can put sleeves on a bodice or pants, or skirts. Gag t-shirts with printed designs, on the other hand, are something different.
Hate to dump a bucket of cold water!