Plants thrive in stability, same as fish really. Keep the plants that suit the temperature and water hardness of your tank, same as fish really.... hang one, something has to be different.
In the early days a planted tank can have a lot of algae growing in leaves, be patient and dont introduce any delicate specimens until the tank has matured, oh that bits the same as fish too....
Ah heres' one, plant growth and health is as much to do with the roots as the stems and leaves. By adding a good quality substrate half the battle is over. Next they need nutrients in the water and good quality light.
The lighting for the tank should be the best you can afford. On my 2' tropical tank I have 2x24W T5. I wouldn't recommend more than this but also I wouldn't advise under 30W. With all the dimensions of the tank and a list of intended plants I can work out what would be exactly right for you, or you can just read my article on this site and work it out yourself
However if you already have the starter and dont want to buy a new one then get the tubes that match the capacity of the starter. You cant attach a 48W tube to a 20W starter!
ye tetra complete substrate bloody good stuff lol and i get all my plants from there good quality but you have to find out what they are in the mixed its best if you have there catalog to hand for quick id book
if you got the smallest mixed one they do you should get some good amazon swords mine are of like crazy ive had to take 3 of the 5 out of my nano as they where kiting all the light from the rest
good luck with it all and hears some good lighting upgrades for in your hood bulbs arnt included tho so consider that with the price