Not sure what advice you're asking for? If it's Antarctic info, then there's a number of books available, follow the link on the top navbar to the books page. As for:
"ALL the material I'd need to read to learn practically everything about Antarctica"
...depends on how many life-times you hav available! I know people who have spent their whole working lives researching some aspect of Antractica, but wouldn't claim to know any where near all there is to know.
Becoming a teacher? Well, that will be about teaching rather than Antarctica - which would be a small part of the job however enthusiastic you are. There are a number of ways of doing this these days, I suggest you start here:
Any specific questions please ask away.