Join Date: May 2007
Location: Fairbanks, Alaska
Try to see if there is someone you can borrow a saddle from that actually fits you. You are honestly better off riding bareback than riding in a saddle that does not fit - it does you no good.
I don't know what experience you have, but it is not ideal, if you are fairly green, for you to be riding a VERY green horse.
Maybe you can keep your eyes open for a different horse that you could ride (in exchange for barn help for someone or something?).
As for balance improvement without going without stirrups or bareback. My best suggestion would be a lot of trot work, but I don't know if that is too much of an option on such a green horse. Again, if you are still working on your balance, riding a green, green horse may not be the best idea.
I hope it works out for you, and you are able to find a good horse to ride.