Mixfeeding

Hi everyone. I'm a ftm and my lo is @ 6 months now. I just started mixfeeding him. Is there a pattern or schedule that I should follow? Nasanay ako sa breastfeeding na by demand ang pag feed kay lo. Currently, this is the pattern that i'm doing; BM1, F1, F2, F3, BM2, BM3 (5 ounces per feeding, both for breastmilk and formula, with 4 hours interval). Is this ok lang? Thoughts? Thankie thankie ❤