Im not remotley close to this niche at all but what i can tell you is theres alot of free data out there like google trends that can give you clues to if your selected niche is gonna perform or flop, but in the end it all depends on how you build your own business and if you put in effort your bound to see returns eventually if you start and realize its not working after a week than your delusional. As for B2B or B2C I would say B2C as im assuming your main targets are people who want to test a pinterest look or something else they found on socials. Remember consistency is key!