Plantgeek.net is a good website to start off with your research.
Here's a subcategory from the site with a list of plants categorized by their difficulty.
http://plantgeek.net/plantguide_cat.php?category=2
You can use regular gravel but then plants will need nutrients so you will need to add it in some form either liquid, dry, or tabs and depending on how much lighting you have you may need co2 as well. Since you're just beginning I would assume you will be using your stock light bulb, if you can purchase light bulbs made for growing plants.
Edit* co2 is only needed if your lights are more than 2.0
WPG (watts per gallon)
I also forgot to mention Welcome to Fishlore!
