You're in luck! I also happen to be 37 and found that I am fully capable of being wise and mature enough to own a GX470.
I know most of our counterpart GX470 owners are essentially wise old owls who only successfully own their GXs through decades upon decades of experience and sage wisdom, but let me assure you, once you too turn 37, you will unlock the skills necessary to succeed in the 120 platform realm.
But in all seriousness - it's a car. You drive it and maintain it. It's not like you're pondering bringing a baby into this world.
If you said, "hey bro, I'm turning 15 tomorrow, is the GX right for me?" I'd say no, but you're 37. You should be well on your way to being old enough to own an SUV.