Sorry for your loss.
One thing I would recommend would be to put some fluval stratum in there if you want plants, but if you are using fake plants, just use any substrate. It is always nice seeing beginners who have proper husbandry as opposed to a fish bowl. One of my cousins has a 75 gallon long tank he has had for about 5 years now, and it looks stunning. If you want to, I would definitely put some nutrient rich substrate in there and add some beginner live plants like Anubias barteri, Anubias petite, Amazon swords, and other easy plants.