What milestones has your 6 month old met? How much does he/she weigh? Is he/she eating solids?

My daughter went to her 6month check up and she is 16.8lbs 27.5in. So that’s good, her pediatrician is concerned because she doesn’t roll over yet.. She rolls from her back to her side but that’s about it she will roll from tummy time to her back. She reaches for toys around her and stands for about 5 seconds before she looses her balance. She said she’s behind on some of the things she should be doing. I’m a first time mom and I feel like I’m not doing a good job ☹️☹️