I had a FUE HT 1 month ago, almost all my hair on the top of my head is spiky. Is this normal? (Photo)

It can take 6 to 12 months after surgery to see results.  If you are concerned it is best to contact your doctor.  It is too early to judge at this point.

You can wear a hair usually a day after surgery.  If you want to wear a wooly hat just make sure it won't pull or get caught.  It is best to consult with your doctor if you are concerned.

Photos cannot assess if you would be a candidate for surgery.  Usually this involves seeing a doctor in person.  You need to explain to the doctor your goals and the doctor needs to explain to you the realistic expectations based on your examinations and your goals.

Thanks for the photo. Important is what the clinic / surgeon advised to you in the post op instructions. You should check again or if you do not have any written instructions you should get in touch with your clinic / surgeon about the issue. All the Best...

After a hair transplantation we give our patients a file with instructions about what and how to proceed. Your head looks dry and still nearly all the scabs are not fallen off. You should contact your surgeon/clinic and ask for details. All the best...

It is best to discuss post operative care and issues with your doctor since every doctor has a slightly different regimen.  In general, you can use hair dyes weeks after surgery after your wounds have healed.  Same goes for hair spray.