From my reading I figured a nutrient rich substrate would be best. I've seen some do it in inert substrate but why add problems for me to overcome.
Next time I'm downtown I'll stop in one of those pet stores and see what they have to offer. I seen they show them on their websites and say they stock beginner type plants. They have a sale on fish right now but I'm going to hold off on them until I get the plant part going, and living lol.
Right now their $1g sale is only for up to 29g, but they do have half off up to 75g. This summer I'll watch to see if they have a $1g on the bigger tanks, I'd love to have a 75g. Probably find something on Craigslist by then though.
When it comes to substrates.. you can have totally inert, not having any nutrients but having a high CEC to hold them, or having nutrients in them already.
Inert isn't worth your time with plants.. unless you are going to be doing things that will feed from the water column.
Things like aquasoil and other such nutrient rich substrates can get to be kind of expensive, depending how much you need
Something with high CEC, can get more expensive.. say eco complete or flourite or whatever.. but you can go the DIY route, and go for something like safeTsorb from tractor supply
Another option is to use dirt capped with sand or whatever.. it works well, but IME gets to be messy if you replant stuff.
Read up on it a bit.. and see if you can join a local aquarium plant group (I'm a member of a couple) you are likely to get the best help in person, and they will know of local suppliers and possibly have group buys too.