Latch on to recordings by Jimmie Rodgers, Patsy Montana, Elton Britt (Britt is hard to find), or contemporary western singers like Liz Masterson and Sean Blackburn, Prickly Pear, or Jill Jones or Swiss yodler, Kerry Christensen. Kerry can be found on the internet, but do not have his website handy. Will look it up and post. Janet McBride is another contemporary yodeler who has recordings available. She would be an excellent model for the neophyte yodeler. Leanne Rymes (whatever) learned her yodel from Janet. She did not take the whole course. Speaking of courses there are some available, stumbled on them via the internet with a general search for yodeling. I think Cathy Fink may have something on teaching folks to yodel. She at least sings a song about it.
Don't be surprised that your joy in yodeling is not shared by all you meet. Some will even resort to making fun of the art. They might not even call it an art. Have sympathy and move on.