Best way to jump start would just be plant heavily with stems and do daily water changes. The same media will help speed it along too. But, definitely daily water changes for the first couple of weeks. Should help your tank have the easiest setup period. Throw some activated carbon in there too for even better chances. Love the fish and stems even if you're scrapping the tank, but it still looks great. Why not keep it as a 0 maintenance cherry shrimp tank or something with a sponge filter and a cheap clip-on light? The moss still looks great.