Just get a good manual breast pump first cause it not too much of an investment and you still dont know if you want to try breastfeeding yet or how your breastfeeding journey will end up like. Manual breast pump or shockingly effective for me and it had my milk flowing after almost giving up on Baf completely. ai had a good supply.
You can wait till you delivered, then ask LC to measure your nipple size then get a new flange and other spare parts.
Kyla