How do you take care of your scalp at home?

I wasn't originally interested in scalp home care, so I didn't really do anything about it. For some reason, I became interested in it after I started getting acne on my scalp.

I wash my hair more often, but why is this happening? I wash my hair like I'm massaging my scalp with a scalp-scaling(?) method, but it gets oily quickly and I often get pimples. If you have any tips for scalp home care, please share them with me! Are there any shampoos that are specifically designed for scalp home care?