Then, there are a lot of courses on Avaya products. There's a web site of Avaya University, http://www.avaya-learning.com, where you can sign up for self-paced or instructor-led courses, there are plenty of them on all Avaya products including switches. Most of the courses are self-paced web-based and has really affordable prices. Use curriculum maps based on your solution area or function of work to pass through your education and achieve some goals. After you learn something, you can pass some exams and assessments to become a certified professional. There are three levels of Avaya certification: Associate, Specialist and Expert. If you want to become certified, visit www.avaya-learning.com, there are curriculum maps for every Avaya certificate available.
Also don't forget to read FAQs and search forums before asking questions. There's a LOT of information on this forum and a lot of topics were discussed more than once, so chances are that you can find an answer to your question instantly, without waiting for someone to answer.
Again, welcome and good luck on your way to become Avaya professional. :)