No problem! I'd still use a neutral blonde demi for toning because if you bleach to say, a level 6, the undertone is orange. So neutral would still make it very warm, just more natural looking. But otherwise, sounds good! Oh, and you're right that lower volume for a longer amount of time is a better bet, especially if you want a warm, not super light color. 20v is generally the standard volume to be used with bleach. Also, my favorite bleach is Ion powder lightener from Sally's, very little damage and didn't disrupt my curl pattern
high porosity (from coloring)

Shampoo: Mop Top Gentle Shampoo
Co-wash: Chistophe Robin Lemon Cleansing Cream
RO: CJ strengthening, Kenra moisturizing
LI: Jessicurl Aloeba
DT: CJ rehab, Christophe Robin Prickly Pear Mask
PT: SS protein treatment, Ouidad 12 minute
Stylers: Jessicurl RR, SS Firm Hold Gel
Oils: caudalie, sweet almond