To answer that, you need to articulate why you need an NLE in the first place.
Do you just want to create your own content?
Are you going to seek an employee seat in a large editing shop? If so, how large?
What hardware do you have access to, including the OS and machine specifications?
Are you going to be creating content for theaters or network TV? or will your work be going largely direct to the web?
Unless you can answer these kinds of questions, it’s impossible to give you advice on what might be the best NLE to get your needs.
Of the two you mention, learning AVID generally sets you on a long path toward a seat in someone elses larger shop. The bet is that when you’re seasoned enough to fill that seat, the AVID system is still as popular as it is today.
Resolve is, IMO, a decent and improving NLE bolted onto a superior color correcting program. That fact that it’s free is amazing. The question is whether and how rapidly it’s NLE component might develop into a full enough featured NLE to attract editors to switch from the current market leaders, ADOBE, APPLE and AVID and adopt Resolve as their primary tool.
Good luck.
Just an observation.
Creator of XinTwo – https://www.xintwo.com
The shortest path to FCP X mastery.