Or you could just wait for Quest v4.0
There's not much in the paid version of Quest 3.53 that's going to hold you back from building the base structure of your game.
Quest 4 will be backwards compatible so you'll be able to continue when it does come out.
Correct me if I'm wrong Alex, but those who purchase Quest get free upgrades for the entire version? So i'd recommend starting now, purchasing Quest 4.0 and continuing work on your game with the ability to use more features with the new version