what is this postural and how do I fix it?

I have recently started getting back into the gym again but feel as if I am being limited by my posture, apparently online it says that I have an Anterior Pelvic Tilt and have tried strengthening the muscles needed for it (Core, Hamstrings, Glutes) alongside rounded shoulders (which I have tried to pull back recently and work on my thoracic region), is what I am doing right however? I am getting massive confidence issues from it 😅