I think if you don't have enough money to buy horse, you can rent one right?
Instead of buying the coins affiliated with this game, you can just get into the gameplay. And if you do not have the financial capacity to get into it on your own, we could take the advise of @sunsilk, to take a scholarship from someone who provides it just like what is done in Axie.
There's also a way through taking a scholarship but just like Axie, you need to look for someone who provides scholarships.