As said above anubias and Java moss are probably the easiest plants, as they could live with the dimmest lights. Java fern and Val are also very easy but will require a decent light for it to grow fast. Dwarf Lily’s/loctus are very easy to grow, and will provide a wide coverage with some stalks. Floating plants are easy, but can become annoying when they take over the entire surface.
This is a 5 year old anubias petite nana, gets very rewarding over years.
This is a 5 year old anubias petite nana, gets very rewarding over years.