Affiliate Marketing Secrets

I’m looking to promote as an affiliate marketer. Can someone guide me what would be some good niche markets to promote?

I cannot find any examples of Niche. I don’t understand it. Can you give me a simple explanation and examples?

Seems like there are thousands of everything on there.

I am a 43 year old male who has been in sales for many years but is starting realize that I may not be in the right line of work. I am engaging with people but I am not a passionate sales guy. My salary is great and I work for a great firm but I am actually thinking of finding my true talents and strengths and following their voice. I am taking tests to find my true strengths and talents and have found that the sales industry may not be my natural fit.
Since I am a single guy at my age I have the “luxury” of time to search for my calling in life. Is this too socially odd or weird from a social norm perspective? Is it too weird that a 43 year old man is looking for his calling?

this is for 5th grade project

Hello Guy,
I am a newbie into building wordpress sites, I want to build these websites for google adsense and affiliate marketing and for that i want to build and configure my theme, plugins, pages and all other requirement for niche websites. I tried to find all info about this online but i get nothing.
So, do you guys know any place where the whole step by step A-Z information is provided?
A little help would really be appreciated.
Thanks:)