if this is your first puppet... i advise you to skip on Ernie for now. I made several puppets and learned how to make the next one better as i trained myself. Research forums, tip sites and videos help too.
I advise you because i tried Ernie without proper knowledge and FAILED. It looked like him, dont get me wrong... but i made his head SUPER LARGE... i cried and feared ever trying again. lol. I'd like to now that i have a better idea, but i'm afride of failure. I've made Cookie and Sherlock Hemlock... I'm in a LONG process of Telly, Grover, and Homer Honker.
I have the material for Telly n Grover... and made their foam skulls... but i stopped to do Homer First... which i'm still tryin to hunt affordable fabric down for. I would most likly do better hunting online, but i like seeing and feeling the fabric to see if it will work for me. I had good luck with the right fabrics... but i'm HORRIBLE with dy'n fur (tried 3 types and failed...)
Yea sry bout that but yes i say work on your own, learn by creating your worst mistakes BUT DO NOT GIVE UP. Every puppet gets better then the last. I know some ppl who feel they can't do better and give up... Not everyone can make their best on their first try. So, DONT GIVE UP.