Dear,

try the below website like:

http://www.alshaqab.com/riding-academy

I guess fees will depend ranging on your level of expertise. Apart from that, the weblink gives an email contact. Send them an email and ask them directly. I am sure they will respond to you asap. If not, keep sending and exhausting them to answer you back :)

Its a pretty cool riding academy...good luck with your endeavour ;)