Suntanning 6 months after a transplant

Hi everyone, I had my surgery 6 months ago and my clinic's instructions say I can go out in the sun, but I have to use SPF 50 sunscreen. I have a few questions:

• Do I need to rub the sunscreen onto my scalp like a shampoo?
• What instructions did your clinic give you?
• Can I get a tan? I mean, I’d really like to get some color since I’ve been wearing a hat outside for 6 months now...