Lol! Yes, that's exactly what I'm saying! Stock up on those plants!
However you do need to know that plants can also be very demanding as well. You really just need to watch out for high light plants like any carpet plant; i.e. dwarf hairgrass, baby tears, glosso, stuff like that. But here's a list of low light plants that you can use!
Java Fern, Java Moss, Anubias, Rotala, Ludwigia, Anacharis, Cabomda, Hornwort, Pennywort, Moneywort, Water Sprite (my fave), water wisteria, common Crypts and most floaters like duckweed, dwarf water lettuce, red root floaters, frog-bit, and salvinia. Those are the plants that need little to no maintinence.
Java Fern and Anubias cannot be planted fully in the substrate, roots can go in but rhizome needs to be sticking out. Rhizome is just the part that roots come out of on bottom and leaves stick out from top, just that little green part between. So you can bury the roots fine or you can tie them to driftwood/ornaments/objects and they'll grow right onto them!
I do suggest using a liquid fertilizer though, it will help keep your plants alive. When you see dying leaves make sure you pluck them out, those will make your ammonia go up, but of course with enough plants it won't matter but it's still nice to take them out to make your plants look good. And you'll still have to do weekly water changes but just 25% to pick up the poop will be good enough
As far as the swords go, they can be grown in low light but they are heavy root feeders where most other plants take from the water column and some take from both column and roots. So basically liquid fertilizer will not do much for them, they will also grow to be over a foot tall if they are regular Amazon Sword so just keep that in mind
if you want to keep them I suggest getting root tabs, super easy. I break mine in half and put half under each sword and it slowly dissolves over a month or so and you just replace that every month-2 months and voila, you have a nice lookin sword!
And you want 5 more plants or 5 more Betta's? lol I suggest getting fast growing plants for now to help with the cycling, some of the fast growing low lights are:
Java Moss, Cabomda, Hornwort, Anacharis, Moneywort, water sprite and water wisteria. Those will soak up all your ammonia better than slow growers.
And if you want to know more, look up the Nitrogen Cycle, that's what we really mean when we say "Cycle" a tank. But basically you're just growing a colony of Beneficial Bacteria during the "cycle" of your tank