What you read in your hours of research should have been reflective of how others take care of their dwarf seahorses.
While most dwarf keepers quit within 3 months to a year, there ARE successful hobbyists that do stick with it. For me, I quit after 2 years as I found it to be a perpetual similarity to raising my standard seahorse fry all the time.
It's time consuming with having to hatch out live brine shrimp nauplii, growing them out to the Instar II stage where they can then feed, and then enriching them for at least 12 hours with a high DHA enrichment, but better with TWO 12 hour enrichment stages with new water and new enrichment for the second stage.
Then, treat with hydrogen peroxide to limit bacteria exposure and feed to the dwarfs.
Ideally all remaining live food should be removed before the next feeding because the nauplii quickly loose their nutrient levels so you only want them to feed on the new enriched nauplii you are adding.
I used live rock as the biological filter, and the only other actual filter I used was a mini filter set with a timer to come on after an hour or two that removed the excess nauplii, turning it off when new food added.
Open ended air lines supplied the needed water movement for gas exchange.