Are there any good home care methods for freckles and blemishes?

My freckles and blemishes are getting more and more numerous, so I'm trying to take care of them at home, but I'm not sure what works.
They say using whitening products helps, but

I'm worried because I've heard that it's hard to expect dramatic changes.
I've heard that UV protection is the most important thing for freckles and blemishes, but I'm curious about what else I should take care of.
I've seen a lot of recommendations for Vitamin C ampoules and tone-up products, so I'm curious if anyone has actually seen results.
I would like to refer to your home care routine for freckles and blemishes.