Don't start a squad, but simply form a group of people who like playing together. Maybe add a common identifier in all your names like an RG at the end, as someone suggested near the start of the thread (squad members get official "@" tags, but you don't need that to show people you're part of a group). If you're a group that works well together, and play the game a lot, you'll probably progress in your abilities faster than most people would. Squads are really there for competitive play, rather than just for being a group of friends who like playing together. You may reach that point someday, but even without it there's no reason you can't get your clan playing Allegiance.
In either case, hopefully you will stick around, at least. It is a great game.
As for concerns of it dying out, well, ~520 regular players or so isn't a lot, but it
has been going up lately... and the game has survived for over a decade, and still gets updated with new code and content all the time. I don't think you have to worry about it dying out in the near future, at least.
