how hard/easy is this niche?

I am having trouble deciding how hard or easy a certain niche is due to high authority of domains on first page.
I will describe the first 10 results and I am hoping you can tell me.

result 1: PR4 domain, ahrefs says DA of 60. over 300 unique backlinks to the domain. The actual page that comes up is an inner page, like example.com/inner-page and the inner page has 20 backlinks.

result 2,3: similar to result 1. high domain authority. the actual result is an inner page again. the inner page has around 10 backlinks

result 4: prweb.com inner page

result 5: homepage, not inner page. 7 backlinks

result 6,7: high domain authority, low authority of actual inner page

result 8,9: youtube videos, someone spammed 4 million backlinks to these

result 10: similar to result 6 and 7. ok domain authority, actual inner page that comes up has like 5 backlinks.

my plan is to get an EMD and focus on a few related keywords. the thing that is scaring me is the domain authorities, the first couple of results are very established sites. is this doable? or should I run away?

Not enough information to make an accurate assessment. I'd need to look at the actual DA #'s, # links, usage of keyword in Title, URL, Description, etc.

However, the good sign in the presence of 2 YT videos in the top 10. I'd go after it, but then again, I don't know what kind of SEO techniques you use. "my plan is to get an EMD" <- Not a good start.