Hey Saxtonhill! Welcome!!!
On the soil it is Miracle Grow Organic Choice Potting Mix (Orange front Bag)! It is what everybody is using, and has worked out well for me! You can search for threads by wkndracer, and he is who got me started with the "dirted" tanks and has most all of the info you will need on how to go about setting up a dirt tank!
On the light I think the 1 T5 HO fixture you have linked to will be more than enough to grow lower light needing plants! I has a 55g with the AH supply retro light kit with 2 T% HO bulbs in it, and it has been growing most any plant I have put into my tank! BUT I also use Compressed CO2 and light fert dosing to keep up with the 2 T5 HOs! Even with just the 1 bulb fixture you are looking at you might need to run at least a DIY CO2 setup, because the T5HO lights are quite a bit of light! BUT with the deeper 24" tank you might be OK! Maybe someone else will chime in about the T5ho and no CO2!
The Anubias, and Java fern and mosses will be just fine with the light you listed, but research on the Sword, as most of them need pretty good light, but some do fine in lower light! also the Valls should be ok too, but I learned with them they like their water to be a bit on the harder side, but so are all of the plants you have been talking about! So just don't get your water too soft!
Hope this helps Ya out some, and I have subscribed to your thread to see your tank come to life!