Be careful when cooking minces designed for pets, a lot of them contain bone, and you don't want to be feeding cooked bones.
Lots of puppies are weaned onto raw, and start gumming chicken wings before their teeth come in, so at 11 months with all his adult teeth you will be amazed at what your boy can eat. It may take a while to build up jaw strength, but he will definitely be able to manage poultry bones which are actually quite soft.
If you want to switch to raw you will find it much simpler than home cooking. As well as not needing to do the actual cooking part, you don't need to worry about supplements, as long as you stick to the ratio of 8:1:1 meat, bone and organ. The only supplements I add are coconut and fish oils, to make up for any shortfalls in the meat due to how it is produced. If I only fed organic, grass reared meats the even this would not be necessary. That is one of the best things about feeding raw, mother nature has balanced it all for you.