I’m just second and thirding everyone saying there are 100% significant downsides to not introducing solids and it can lead to true feeding issues in the future. Breastmilk will still be the main source of nutrition for your baby but it is absolutely necessary to start introducing textures to your child at around six months. You’ll feed at the breast first and then offer solids. Babies need to start to learn how to handle foods for all sorts of reasons - texture exposure, motor skills, swallowing, so many things.
Susan is a great lactation consultant who also offers great classes on starting solids. You are at the perfect stage when she recommends taking it and she has one in a few weeks. She will help on how to continue breastfeeding and start solids without too much stress
https://www.arlingtonlactation.com/copy-of-class-offerings