Am i doing it the right way for a review website?

hi
I have been working on a review website and so i m doing keyword research and making articles for those keywords.
i want a quick advice.!
for example if i choose a keyword with around 600 monthly searches and i know it has an overall competition of 40/100 then how many articles should i write for that particular keyword?
i write my articles nice and long with eye catching headings and unique readable content and most of my posts are about 800 words.
I am basically planning to start a review website which is general so my plan is to make
5 cosmetic reviews
5 hardware reviews.
5 kitchen reviews.
5 garden products reviews.
5 air purifier reviews.
5 health articles.
5 hair loss product reviews.
So after i make content of like 800 words each post with all unique and readable informational content, will i be able to get something going in my life?
i mean , some MONEY!
i am planning to apply for amazon affiliates after that.

NOTE:
--I have already completed 16 articles in which 9 articles are of air purifiers (800+ words each with proper headings, Pros, Cons, FAQs about the products, features etc)
--I got 6 informational unique articles about weight loss. about 500 words each.
--4 cosmetic reviews around 500 words each.

I know learning about earning money is to be done by a person himself and YES i am working hard on learning stuff but if someone want to help me out from here on wards it would be great! I am a novice in SEO skills but i have been reading a lot about it. Hopefully if i get a mentor at this stage then it would be a great thing for me!