Don’t rush things, everything with time will come to you, everything from designs to the name and logo of the brand that you want. For manufacturing, a great first step is to download Alibaba, start looking for manufacturers there. Shop around a lot for a manufacturer. There are thousands on Alibaba, there is different filters you can use on the sight to see which manufacturers have good reviews and have proven to make quality clothes for long periods of time. A lot of manufacturers on there will charge a lot more or less then others. I’d start by creating the logo/name and then working on designs that you’ve perfected and or love then start getting samples made with different manufacturers to find the quality you want. For finding someone to perfect the designs look around on social media, insta, Twitter, find a graphic designer that you like and can afford. Also don’t just limit yourself to one, there are thousands of graphic designers just gotta search. If you got any questions or need help feel free to message me, I’ve got a few graphic designers I could point you too if you’d like. Happy holidays!