Helloooo! Welcome to CS.com You'll love it here!
I'm new to all of this as well, so here's a newbie perspective. I started out with something very similar to what you're using and liked it a lot, but it was impossible to find the snake's waste. I switched to aspen and that fixes that problem, but also my snake seems to like it better. He loves to tunnel through it from one end to the other.
Astroturf is fine as well, but you need to have several pieces cut to fit your tank so you can rotate them for the wash. In my next tank, I'm going to consider carpet because I really like the look of it.
Others use paper towels which are inexpensive and easy to replace as needed.
If you do a search above on "substrate" you'll find several options with people's opinions.
Best of luck with your new corn!!