I’m also new to planted tanks, and aquariums in general, but I can say that DHG is the first carpeting plant I’ve managed to not kill, and even propogate.
I have it in a 5 gallon hex with DIY (yeast) co2, a nicrew light from amazon, and an off-brand eco-complete from petsmart. Minimal ferts, 8 hour photoperiod. It seems to be doing pretty well. There was a lot of die-off just after I planted as new immersed leaves grew and the old emersed leaves died, but they’re almost as full now as when I planted.
Currently getting it going in a 10g with almost identical conditions, but a little more co2 and water column dosing. I’d put this plant in a medium light category, however, high light (combined with boosted co2 and ferts) will get you faster growth