I had a surgery on the head of 2nd metatarsal for osteochondritis-freiberg disease. When I will be able to walk normally again? I had the problem 1yea

It depends... On if the surgery was a total metatarsal head resection, partial head resection, head remodeling, joint replacement, etc.
2nd metatarsal . You should discuss this with your surgeon. A lot depends on the procedural approach to your problem and your results. Recovery and recuperation can be a slow process following foot surgery ! its important to follow up and monitor the healing of the bone.