During the first few weeks of breastfeeding when you're building up your breast milk supply, you should breastfeed your newborn from both breasts at each feeding if you can. (verywellfamily.com)
During the early weeks of breastfeeding while you and your baby are in the learning process, you will want to pay special attention to proper positioning and latch - on. (motherandchildhealth.com)
This is true especially in the first few weeks of breastfeeding when your baby needs to be frequently fed. (intelligentmother.com)