There is a wealth of information about seahorses available on the site. The best way to study all of the stuff is to follow the links and read through the FAMA columns and articles available through this site online, and to search the forum and its archives for any information in which you have an interest. There is a rectangular window in the upper right-hand corner (just above the page numbers) on the forum with the words "search forum" in it. Just type the word or phrase you are looking for into that window and press "Enter" on your keyboard, and the results of your search will pop up in just a few moments. For example, if you type in "feeding tips" or "tank set-up advice," you’ll find some detailed discussions explaining how to feed seahorses properly and how to create an optimum environment for seahorses in your aquarium.
Lurking is highly encouraged but once you feel you are ready to take the next step, I would strongly recommend that you consider participating in the Ocean Rider seahorse training program, as outlined in the very first post on this forum. It will teach you everything you need to know about the care and keeping of seahorses in the aquarium.
Best of luck getting up to speed on the aquarium care and requirements of seahorses!