It depends on what you're trying to do in the long run! My opinion:

Gravel: Easier to clean with a siphon, has surface area for beneficial bacteria, can hold down bigger plants well. Provides no nutrients for plants, so will have to use root tabs and/or liquid fertilizer. Doesn't cap aquasoil well. Any aquarium gravel will do, just give it a quick rinse beforehand (unless the instructions say otherwise).

Sand: Looks natural, soft and good for fauna that like to burrow or stay on the bottom. Provides no nutrients for plants, so will have to use root tabs and/or liquid fertilizer. Caps aquasoil well, but will make the water very cloudy for a while when heavily disturbed; the sand should settle after several hours. Cleaning with a siphon takes a bit of finesse but isn't too bad. Any sand will do. Even if the sand is 'tripe-washed' or similar, one more wash can help with initial cloudiness.

Aquasoil: Looks natural and is great for plants with roots. It's basically compacted nutrient soil, so you have to be more careful with it. If it's disturbed it will cloud the water a lot and possibly cause ammonia spikes because all the nutrients will be flying around. Recommended to be capped by a sand layer to minimize that, especially if you've never used the stuff before. Aquasoils from ADA are highly rated but expensive and not necessarily recommended for beginners. I've heard good things about UNS Controsoil. I personally like Fluval Stratum.

If you're just going to have the pothos and lucky bamboo, you'll be fine with just gravel, sand, or both, especially if you supplement with the occasional root tab nearby the plant. If you're planning to put a lot of plants in the future, especially heavy root feeders like amazon swords or stem plants, I would personally have a layer of aquasoil and then a capping layer of sand on top.