Approval- what’s next

Hello I was approved for I believe SSI only. It just says disability on website- this was at the hearing level which was on December 20th. What should I do I expect now ? I applied 2 years ago . When should I expect backpay and monthly payments to start ?

Hello I was approved for I believe SSI only. It just says disability on website- this was at the hearing level which was on December 20th. What should I do I expect now ? I applied 2 years ago . When should I expect backpay and monthly payments to start ?