Defo do it - you'll be hooked. There's a good online test here:
https://www.eclecticenergies.com/enneagram/test.php
And the eneagram institute (https://www.enneagraminstitute.com/) has some alright introductory material. Although can thoroughly recommend to read "Wisdom of the eneagram" by Riso Hudson and to also have as reference "the eneagram in love and work" by Helen Palmer.

Don't worry@mikeparker - you're not worthless!!