how much worth is This Amazon niche

Hi to all members
I have an amazon review site in electronics that consists of laptops, cameras, and accessories reviews. A guy suggested me niche with words that it is evergreen niche and people will always tend to buy these products, but am really stuck most of the electronic devices have bulk of competitions with exact keyword search goes in millions with top sites that never competable e.g CNET, techradar etc those who have low competition have less customer trends, although I prefer long tail keywords like
Exect keyword : canon eos rebel t3 Searches: 5,100,000


long tail keyword: canon eos rebel t3 CMOS DSLR review Searches: 388,000


does this long tail keywords will actually make sales?( for longtail CNET, techradar still on top)
what are your suggestion in electronic niche ( I am willing to write on technology topics)
do you prefer low trends products or past year products?
Advance thanks your considerations
Have a nice journey

did you find solution for this problem? i think the answer could be changing the niche

I also wonder this I made for you a quick analyse and most of the page has high DA PA and PR, but most of it not relevant to your niche also their content optimization is very low, but like pinterest facebook or some kind of social media sites are on top sometimes and can we beat the that page of social media i dont know, maybe someone can explain to us Here is your analysis