If that was the take away from my message, then I feel i have miscommunicated. Please do not assume that I meant that OP should reconsider leaving or joining a religion based off of age, as that was absolutely not my intention.

I will summarize, don't make rash decisions, because decisions made at 18 are rarely decisions that last with us our entire lives. It is a very transformative time in our lives, and the knowledge of this is rarely communicated to the people going through it.

I hope that clears that up!