I scrubbed my face too hard and skin came off, how long will it take to heal and what should I do for faster healing? Will it scar?

TLC. Take it easy on the tissue now that it is irritated. Use only mild soap for washing and you may want to apply light coating of a snd d ointment a couple of times a day. Scarring not likely. Keep clean and protected and keep from getting dry. Do not use vaseline. Good luck.
Be patient. Wash it gently with mild soap twice a day and apply olive oil. Avoid any skin irritants and be patient. If concerned see your PCP for evaluation and medical treatment.