great first run !
your tarp reminded me of a few retreats I attended where there were no less than 500 people (usually 1000) who used these blue tarps outside on the ground.
They were noisy as all get out. No one got sleep! A bit later I turned to a bivy
that was used by the Navy Seals. Much better sleep!
You're on your way! and haha! to what gunner said:
You about to start a dangerous journery buying new gear.