I think you should give plants another go. Honestly, one failed attempt isn't enough to warrant quitting IMO. I failed with plants several times before getting to the point that I feel like I can sustain plants. The tank you have is fine for plants. Let me show you my first success with plants. It was a 10g with a standard 15w T8 with a $2 bulb from walmart. PFS, a piece of driftwood, and a lot of algae (i left my lights on for 12 hours lol).
Before you say anything, this tank is hiddeous. But... it just goes to show that with patience and trial and error, you can succeed.
That's HM (baby tears), what many consider to be a higher light plant. It is a little straggly because of the lower lighting, but still..