I would do keyword research first and then choose the best between the available results. Best means something with the competition that is not strong but also has a good monthly search volume. This way you can easily get those subscribers you want just with smart planning.
Maybe name won't be ideal for branding but the goal is subscribers so...
For example "pizza near me " has 500 000 monthly searches average in USA google.If a site as
https://www.georgiospizzeria.menu/ is in top 10 with such a miserable job, then it is clear there is a place to be taken.
There are even worse sites ranking for this particular keyword (
Piece O Pizza & Deli(Official Site)-Torrance, CA | Order Food Online | Clorder).
I am not sure will Rochard understand the value of what I've written above (95% of people here are totally blind) but this something I would never miss if I am in his niche.