Your doctor is really the only one that can tell you it's okay. Generally with most patients it is but it depends on how quickly everything is healing for you, and only your doctor knows the specifics of your transplant to know if you can be cleared after two weeks.
You need a Master Plan before starting surgery to plan for future balding. If your planning was done right, you should be able to shave your head for a "normal" look. You can also consider further surgery or SMP (or both) depending on planning and your ultimate (realistic) goals.
Redness should subside after a few weeks. In rare cases it can last a few months. If your surgery was 8 months ago, maybe you should check with your doctor. You may not see full growth until a year. In rare cases up to 18 months. Check with your doctor if you...