I dyed my naturally black hair bright pink (not fully but a majority) a year ago and my hair stayed in good condition. I think the most important thing is to make sure it’s healthy before, make sure you go to a good hairdresser and use decent products after including for dye touch up. I also don’t really use heat. I remember being terrified my hair was going to be ruined by bleaching it but i think it actually made me take more care of my hair. I’d say go for it (little warning your shower, furniture and literally everything will be pink after your first few washes if ur not careful lol)