Affiliate Marketing Secrets

I know French lingerie is famous for their overall quality but how does Victoria’s Secret lingerie stacks up against it? Is it seen as just mid-range mass market American stuff?
More specifically, I will be going to Paris next month to meet my LD bf and was wondering if it would be better for me to just buy/pack a bunch of bras there or run out to the nearest shop the day after I arrive to pick up some sexy underthings?

Basically i want to start building my own business but dont know how.
How would you go about looking into the niche and mass market. and any idea’s on any good starter markets.
Im studying business a level, and need some help/idea’s.
Also any good ideas on what to start my business on?
and how would i go about doing it?