Your light is low light. It should grow hardy low light plants.
API Leaf Zone is fine. I use it and Seachem Flourish Comprehensive liquid ferts. I add my Ferts and Carbon source 1x weekly after my PWC. I'm using Seachem Excel for Carbon. You can add Carbon more often. Just read directions.
Your tank is tiny and the light isn't strong, but you can still have fun with it and grow some plants. I have plants in every tank, even my 1.5g.
Lights may look bright to us, but PAR is the measure of how much light actually reaches the bottom of the tank. My club has a PAR meter that we loan out to club members to check their lighting. It's pretty interesting.
My 10g with two screw in 10 watt CFLs ( horizontal placement ) was almost the exact same PAR as my rimless 10g with the very expensive Archaea LED fixture.
I bought it for looks, and it grows plants so I'm happy.
Some plant specific LEDs are pretty powerful. But they cost more
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