How to select a niche for youtube & website?

1. Trend..up or dowdown?

Up 20
Normal 15
Evergreen 50

2. Keyword volume
3. Keyword research countries.?
4. Does Advertisers exists on that niche?
5. Competitor on that niche.?
6. Niche understanding?
7. Sub niches of that niche?
8. How many total Keywords of that subniches.
(Google trends graph 50..it mean evergreen niche and more peoples working on that niche.)

#عدیل اعوان🌚🌚