New seller I would love some input!

Hi I’m soon to be a seller, I’ve been saving up for a while now and I think I made enough to start. I’m gonna list few different niches , could anyone please tell me what one of these is the best to start with and will sell , or better yet number them from best to worst. 1)Custom car products like lights n cosmetics 2) Home & Decor 3) Mens&Womens apparel 4) cat stuff 5) Sleep n wellness . Like I mentioned I am new I’d appreciate tips n things to look out for. Thank you everyone! ( Things to note I am passionate about cars and I also have a YouTube channel for meditation and sleep sounds that’s getting around 100k views a month)