That even the greatest academic leader started out as a newcomer. This is a necessary step in your initiation as a fellow scholar. Most associations post a great deal of information about conferences on their Web site. Faculty and fellow students are excellent sources to find more information about specific conferences. Be sure to talk to your program chair as well.
Many associations offer scholarships for students.
There may also be a grant that would cover your expenses to a conference. Registration is typically reduced for a student. If you do not see a student rate, email the association and ask them if you could volunteer at the conference in exchange for a reduced registration rate or a registration waiver. To cut down on housing costs, share a room with fellow students. And, while it's best to stay in the host hotel in order to have more opportunity to meet participants, you may find housing not too far from the hotel that is less expensive.