Hi Pace,
Yes, I have had FUE with Dr. Umar. So as far as FUE healing, I can only speak in terms of this doctor. Since Dr. Umar uses special custom made small caliber extraction tools, the extraction holes in the donor area healed/closed up the night I had my surgery. I had very little scabbing, and everything in that area looked flawless within three days.
As far as the recipient area. You will have some pinkness and scabbing in that area. The goal is to have the scabbing come off gradually within 10 days so the new grafts can breathe properly. You will be given instructions on how to wash and care for your hair during this period. The first three days, you just pour lukewarm water over your hair with a little baby shampoo. Later, as the grafts become affixed, you work up to the point where you want to wash your hair in the shower and gently rub off the scabbing without using your fingernails.
since you have straight hair, I would grow it out longer to disguise the recipient area and you should be fine. As far as the donor area, the doc will only shave a section for extractions, then your could comb your longer hair over the area. I would say would be fine to return to work within two weeks, maybe sooner. Your type of hair should be good for covering up the HT work while it heals and grows.
Let me know if you have any more questions.
Atticus