hey there Kayla. my hair is originally dark brown i have had burgundy red black and two perms in my hair, i am now a platinum blonde it is achievable if you have patience.
hairdressers always say if you wanna go black theres no turning back but you know what that is bullshoot.
Use a blue highlighter bleach powder about $5.00 and 40vol developer about $6 to $8.00 buy a plastic bleach mixing bowl and bleaching brush also buy some clips plastic only metal and bleach react n thats no good.
all this will cost about $20 to $25.00 cheap as once you have the stuff it never goes off and you got for years.
start a bit at a time till the head is covered, do your regrowth first.
don't panic if its orange coz your hair is black and your hair needs to go thru stages its starts with orange and gradually gets lighter.
leave it 1 to 2 weeks in between and then do the process again.
keep going with this till the blonde you want.
DON'T DO IT EVERYDAY COZ YOUR HAIR WILL GO JELLY AND IT WILL BREAK OFF - TRUST ME YOU DON'T WANT THAT TO HAPPEN!
the colours your getting on your growth won't be noticed once you start bleaching, coz the bleach will strip it out. all you will have is ur natural regrowth that needs to be touched up once a month only.
you have to be patient with the colour is it goes thru the process coz there is no other way that it will turn blonde but to be a ranga for a week or so.
i hope that this will help you!!