One time before, I've bleached from ends of my hair to the middle of my hair.

this is correct but it would sound better and more natural if you said "I've bleached the middle of my hair to my ends"

I mean, half of my hair was brown, and half was blond.

I wonder if black hair goes well with Japanese people after all.

Sometimes, I dye my hair red, but when I dye with redo so, it gradually fades over time.

TAll the colour all disappears within three weeks and getit goes back to being light brown.

One time before, I've bleached from ends of my hair to the middle of my hair, I bleached my hair from midway right down to the ends.

What I mean is that half of my hair was brown, and half was blonde.

I liked it, but my hair gotwas damaged a lot, so since thenin the process so I haven't tried it since.

The other day, I tried changing my hair color back into black using an photo editing app.

I’m now wondering whether black hair goes well wsuiths Japanese people after all.

Well written!

I have black hair, soand I always dye my hair light brown.

Sometimes, I dye my hair red, but when I dye with red itthe colour gradually fades over time.

The color all disappears within three weeks and getmy hair returns back to light brown.

I have long hair that reaches to(down) to the middle of my back.

One timce before, I've bleached from the ends of my hair to the middle of my hair.

I mean half of my hair was brown, and half was blonde.

I liked it, but my hair got very damaged a lot, so since then, so I haven't tried it again since then.

The other day, I tried changediting my hair color in(to) black using an photo editing app.

I wonderrealized that black hair goes well wsuiths Japanese people after all.

I have black hair, sobut I always dye my hair light brown.

I changed "so" to "but" because I think "I always dye my hair light brown" contrasts with "I have black hair." I feel like "so" would be used more if you're talking about a result or effect of having black hair. For example, "I have black hair, so it takes a while to bleach it blonde."

Sometimes, I dye my hair red, but when I dye with red it, the color gradually fades over time.

The color allcompletely disappears within three weeks and getturns back to light brown.

I have long hair that reaches to the middle of my back.

One time before, I've bleached fromce I bleached my hair from the ends of my hair to the middle of my hair.

I mean, half of my hair was brown, and half was blond.

Or "That is, half of my hair was brown, and half was blond."

The other day, I tried changing my hair color into black in a photo using an photo editing app.

I wonder if black hair goes well with Japanese people after all.