Some easy plants you can try are anacharis, anubias, java moss, java fern, Cryptocoryne wendtii, wisteria, dwarf sag etc. Those bulbs you get at petsmart/petco would work. I have grown all of those. They typically are dwarf lilys, onion plant, and aponogetons. I think with the included light fixture you got you'd be ok to grow these plants I listed. You want daylight bulbs like 6500K. I would invest more into providing nutrients to the plants though. Buy some good plant substrate and at the very least some liquid fertilizers. I bought a T5NO fixture for like $65 that fits a 29 gallon I got. Provides low-medium light. I can grow most plants, even some of the harder ones. But I also dose fertilizers and excel, plus DIY C02. But I only add in the C02 cause my tank is moderate/heavily planted. So more plants = more competition for C02, then C02 supplement becomes more necessary.
But for most easier plants, and if you plants lightly/moderate you don't need to supplement C02 IMO. Plus lower light means plants grow slower, and their uptake of C02/ferts is slower.