Any Clothing brand Start-up founders / Established clothing brand owners here?

Basically I am manufacturer involves in the manufacturing of Apparels. I mostly engage in knitted products which includes tshirts , Polos , hoodies , sweatshirts etc…

For a long time I am thinking to launch a brand on my own…

Would be happy to hear yours winning stores and general inputs. Apart from this , I have few questions…

1) Does organic / sustainable clothing actually work for a new brand, or is it still more of a niche thing.

2) How many styles or SKUs did you start with (or wish you had started with)?

3) From yours experience Which category is easier to start with? Kids or Adults ( Menswear , Womenswear )

4) Apart from Amazon and Etsy, what other platforms or channels have worked for you?

Apart from if there is any general feedbacks would love to hear… Thanks in advance.