Most recommendations fall around 1-1.5 grams per kilogram of body weight for babies or around 11 grams of protein per day for children 7-12 months old. For example, an average 20 pounds, or 9.1 kg child would need approximately 9-14 grams of protein per day.

Protein is very important but it’s about a good balance

At 6 months, your baby will still be getting most of their nutrition from breast milk or formula. From 4-6 months is the time that you can start to introduce solid foods. Your baby will take only small amounts of solid foods at first. Start feeding your baby solids once a day, building to 2 or 3 times a day.
Many pediatric authorities, specifically in Canada, the EU and the U.K. recommend meat as one of baby’s first solid foods. Meat may be a good first food but probably not THE first food. You might give meat a try between 6-8 months old. Introducing meats earlier will help baby gain more iron, zinc and also protein.
Personally I started with egg as first solid food, which is also high in protein. But again, it’s just about the taste and chew experience in the beginning.

When they first switch to solids, they should still be having milk. There will be enough protein in the milk to not worry