Okay, before you go crazy, this isn't an insane idea, even though it's a super saturated market. What you need to do is get a good design (you can do this buy contacting a freelance designer) (cheaper) and having them create a great design for your brand. Focus on your target audience e.g. Women? Children? Men? Unisex? Babies clothes? Teens? Etc. A great way I've seen brands promote their ideas is via Instagram. Yes, Instagram. A great way to utilise Instagram is to have people endorse your products in return for you sponsoring them. E.g. Have them wear your shirt and showcase it to their followers = more attention for your brand. If you can't, for whatever reason make your own t-shirts etc, head over to represent.com or spreadshirt.com. These websites allows you to sell your clothes without you having to worry about financials/inventory, etc. One example of a brand (who aren't clothing related) is Fit tea. They've leveraged their customers to grow their brand by making them their very own brand ambassadors. E.g. A customer of theirs Posting a picture of the fit tea box and uploading it to drive awareness of the product on Instagram. Don't forget that if you decide to go down this route, hashtags are your friends. Use relevant hashtags consistently and network with other fashion enthusiasts.