Pick a substrate that you like as it is very hard and messy to change it out later. You might find a few months down the road that you want to add those better lights and a CO2 source to get those plants really growing. I believe the "plant type" substrates hold the plant's roots in the "ground" better than normal aquarium gravel.
If you are planning on having a fish tank with a few plants, then normal gravel will work just fine.
I have several planted tanks and am a big fan of laterite mixed with regular gravel. When I set up the tank, I give it a couple days to let the dust "settle". My plants seem to do well and have swords, crypts, hygrophilia, limnophiia and many others. I'm not a technical person and don't use Co2, fancy lighting and remember to fertilise once a year if I need to.
I think the laterite gravel mix and healthy fish help my plants grow!!!