introducing formular to 4month old

Sandra 🌸🌜💜🌛🌸

ill be back to work next week, and i have bought some formular to introduce to my 20 weeks old baby to get use to the taste so i may eventually wean off breastmilk when she's about 6 months.. she is only taking about 1 ounce and a half at a time.. is this normal when introducing formular or is this her rejecting it?