Please tell me how long it takes for to heal from ganglion cyst removal surgery?

It depends on where. Soft tissue surgery usually heals in about 3 weeks. With ganglions the location can cause this to vary. It is possible for the incision to heal but have a delay in restoration of full function depending on the tendon involved.
Quick. Usually less than a week. Depends on one's activities. Would not try a series of pushups too soon after the surgery.