My 11 mo twins are difficult to handle and I feel very sleepy. I am sleep deprived. I find it so hard to concentrate. Also my tiny baby constantly beats and pokes my other twin.
All parents are sleep deprived; parents of twins even more so.
If you can get help for a couple of hours every day during which you can take a long nap, it will help to reduce your sleep deficit.
Some hospitals have information on coping with twins and volunteers who will help the parents of multiple gestations. Perhaps you can ask at the hospital where your twins were born, or your doctor or HV; or perhaps you have some friends who have asked if and how they can help. Don't be shy; tell them you'd love to get some much needed sleep. Have them put the word out to your friends. Most people are happy to help, and if five people help once a week, that's significant. If you see a social worker for any reason, ask there, too.
Sleep when your babies sleep, and optimize their sleep schedules as much as possible.