Yeah, as much as I waxed poetic about the benefits of subbing, if you're just trying the game out and aren't sure about it, don't spend the money. It isn't going to have a significant effect on your experience in the first, oh, 10-20 hours or so I'd say; you're not gonna have stuff to fill your stash with if you're just bumbling around doing quests and events and exploring, and the survival tent's benefits mostly come about in the late game, where you're wanting to travel across the map to specific locations repeatedly for farming or dropping in endgame stuff into your stash for later breakdown or whatever.
It's a great quality-of-life improvement from the latter half or so of the story progression onward, but by all means make sure you're invested and enjoying the game before you drop the money on it; it isn't necessary for the core gameplay loops you should be enjoying for the game to be worthwhile.