I have particular interest in working with animals that don't get as much support as 'charismatic megafauna' like lions, elephants, gorillas and etc. Red pandas, as far as I know, are one such species. :3
Invertebrates are one of the most important parts of the ecosystem, but they really don't get the attention they deserve.
Seek out organizations or researchers that are working on species or ecosystems that interest you. For example, if you want to work on insects or other terrestrial invertebrates, check out the Xerces Society. Informationally interview the people doing conservation work that you care about and want to do. Ask them how they got their start doing the work. See if you can intern or volunteer with them. Find out from them what academic or experiential qualifications that you need to do that work, and make a plan to acquire those skills and qualifications.