You can try splinting, hard to say if that will be effective or not depending on the breaks. It sounds like there may be multiple fractures. The next question is whether you are willing to care for it for the rest of it's life, it may not be able to return to the wild depending on how it heals, if it heals. And whether it's legal to keep it where you are.
This is a splinting manual, attached below, should help. Make sure all splints are padded and wraps are not too tight. Check often and change as needed, if there is swelling then circulation could be cut off. You may need to use some kind of sling also, to help keep it upright while the bones heal, examples pictured below.
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