Do a little introspection (if you haven't already) and find out whether you're truly passionate about teaching and/or English. If yes (even just a little), then I'm sure you'll be fine and do alright within the alotted time. Do you have a course tutor?
Other than how you feel towards TEFL, keep in mind the rewards. There's a whole number of them (i.e. Spain, boyfriend, money, knowledge, skills, respect, a worldwide TEFL network...) !