Hi & Welcome to TMA

First off, thanks for the kind words. There are several sources to start you off.

http://www.irishmegaliths.org.uk/down.htm
http://www.megalithomania.com/show/county/7

should get you a good starting list. Unfortunately both are a bit thin on directions, so I'll recommend what I always recommend - Ordnance Survey maps are the only way to find these monuments. In the UK & Ireland we are blessed with great maps, which unlike most other countries mark our ancient monuments.

When I started out I would look around the web for good looking sites and then buy the relevant OS map to plan my visit and also pick out some sites that are close by to visit as well while I was in the area.

If you've done the Boyne Valley and the Giant's Ring then there aren't many sites that are as immediately impressive, but you have some great ones very near to you.

If you want any specific info that you can't find on the web then contact me through megalithomania.

Good luck with the megalith hunting and the course!