I live in lakeside where all of the horses are and really want to ride one

So I live in Lakeside, where all of the horses are, and would really love to ride one sometime. Growing up, my family would go on trips all around the world. Two of the trips are in Hawaii and another in Australia. Both times we went horseback riding, and I loved it. I would love to ride a horse again, but I'm too shy and not about to ask to ride someone else's horse. But if you own a horse and are open to a stranger to ride one with you, please comment. It would not be polite to ask.