Hi, I'd like to help you with your question.
I am sorry to hear about your diagnosis. It is life altering and overwhelming. Have you been able to talk to anyone about how you feel? If you have not seen a therapist, it would be a good idea for you to consider going. You need the support right now and a therapist could help you work on how you want to handle your life now with this diagnosis. Talk to your doctor about a referral or search on line at http://therapists.psychologytoday.com/rms/.
Here are some resources to help you:
Keeping Busy: A Handbook of Activities for Persons with Dementia by James R. Dowling
Dancing with Dementia: My Story of Living Positively with Dementia by Christine Bryden
You can find these on Amazon.com or your local library may have them for you.
There are many things you could consider doing now that you are home. Volunteer work is an excellent way to use your medical skills to help others while tailoring the work to your limitations. Try a hospital, nursing home or elder care. You could also work at the library, community organizations or with children. Any organizations such as United Way also need volunteers, especially with your skills.
You could also try a hobby. Take a class and learn a new skill. It will help you stay engaged and make friends. If you have a Joann's near you, they often have good classes if you like crafts. Or your local community college has lots of non credit courses that teach you something without the pressure of tests and passing grades.
Join a support group. Here is a link to a group that helps those with dementia-
Start a blog about your experience. It would be very therapeutic for you, and you could help others who have the same diagnosis or the caregivers who help them.
These are just some of the ideas you could try. They may not all be for you, but they could lead you to other opportunities that do work.
Let me know if there is any thing else I can help you with,