Congratulations on passing your CELTA course! My advice would be to make your CV as relevant as possible - you say you spent most of your time working with horses, but presumably there was a bit of time spent working with people too? If so I'd emphasise your communication, interpersonal, organisational and leadership skills, as well as your CELTA qualification.
I'd also look into doing a little bit of voluntary teaching at community centres etc to boost your CV further.
- For Teachers