Lightening hair

Trying to go from a level 3- 4 to a light 6-7. Going to get olaplex no matter what I do because my hair is finally healthy. While I’ve lightened my hair I’ve never done it while my hairs been this healthy. Any advice about what to buy and do? Also posting pictures because if you think I’ll look like trash with lighter hair please be honest

Both these pictures are old. And the light one was just me letting a darker color fade out into that

This is my current color