Repairing sao and changing skin


so i recently bought an used shamisen but it needs some repairs, like fixing some cracks it has in the joints of the sao and changing the skin

my questions are, how should i fix the sao? it works if i put some wood glue on the cracks and tie arround very tight with a rope? and is home made rice glue strong enought for tsugaru shamisen skin or should i buy some
rice glue from amazon? ( also, does this one work?)