The more plants the better for a Silent Cycle. But fast growers are what you want to soak up the ammonia.
Fast, low light plants:
Anacharis, Water Sprite, Rotala, Ludwigia, Cabomda, Hornwort, Moneywort, Java Moss and water wisteria.
But in addition to some fast growers, some slow growers are great too so your tank doesn't become a jungle (although I love the jungle look lol)
Slower, low lights:
Anubias and Java Ferns (Windlov, needleleaf, broadleaf and lace)
So in total you probably want about 10-15 plants in there ideally but it will work with about 8-10. Water wisteria is probably the fastest growing plant you can get along with Anacharis although you probably won't be able to find that everywhere.
You also have to realize that if you buy the plants in the tubes at Petco/Petsmart they will generally "melt" when you put them in the tank. That is their way of acclimating to your water and they will grow back. Only snip off a leaf if it turns brown but if it's green still and just looks like it's melting, it's fine to leave there and it will grow back
You may need some liquid fert but that's pretty easy, just dose it after your water change. The directions are usually 5ml per 10 gallons once a week but I split that into two feedings twice a week. So for a 10 gallon it would 2.5 ml on Wed. and another 2.5ml on Saturday and it works well. You can use either API's LeafZone or SeaChem's Flourish (Do not get Flourish Excel! That's something different you don't need!)
If you've got other questions feel free to ask or PM me