I want to learn Gaelic.

Buntús Cainte is the best book out there. It's a 3 part series. The first one covers the basics, second one and third one are intermediate / slightly advanced. Get the three of them together, cos they are dirt cheap Come with a CD.

Free Lessons here: http://www.independent.ie/education/features/learn-irish-with-liam-o-maonlai-692551.html

Burn them onto a CD and listen when you get a chance. Get a really small notebook, and write down any phrases you hear or don't understand. Get a small pocket dictionary too. Try find a conversational group in your area, and start there. It will all fall into place if you do all of the above. Expect 1-2 years to get a decent grasp of the language, but you should notice a remarkable improvement within a few months.

Good decision Take it slowly, and don't overdo it. Try learn a few new words every week. Use Buntús Cainte as a reference book for how to use the words in the sentence. Don't forget to get a little notepad, and write down any cool phrases you hear, or read on the internet or Irish papers. It will really help exapnd your vocab.