When I pull my foreskin back it doesn’t seem totally separate from the glans. What should I do?

This is very common and sounds like something called adhesions. Realistically there is no reason to get to a doctor right away. However, a doctor would be able to give you a steroid ointment that you can use to help the foreskin and the glans separate painlessly. That is my recommendation, and you could probably describe it to your doctor if you’re too embarrassed to show them.