Should I go for it?

Hey guys.

I am looking towards making another niche site, that will most probably review/ point towards a CB product.

The competition is as follows:

"product name review" 683 000 results ; 4400 global monthly searches
main niche keyword - 567 000 000 results ; 368,000 global monthly searches
another possible main keyword - 837 000 000 results ; 5,400 global monthly searches

Yeah, that's a whopper, but here is the fun part;

Product name review only has a couple of ridiculous sniper sites on first and second with almost no proper SEO.
main niche keyword - Site with EDM with 1,800 backlinks (Also selling CB product) and some .biz guy. All else are articles and pages.
another main niche keyword - only one EMD on first (almost no seo)

Do you think I should go for this or search for something less competitive. Am I just getting over my head thinking I can rank for these, or should I go for it?

Would you?

Thanks for your help guys!

OK, so I did some extra searching, and this is starting to seem too much of a challenge. Do you think it will be possible to rank on pg1 for this if I don't use any automation software? Maybe I should plan on buying some Fiverr gigs?

It will be a MNS which will be reviewing a Cb product.