Be careful when pulling your foreskin back, as getting it more elastic will be something you will have to do step by step. If you struggle, you can visit your doctor and he/she could give you an steroids cream that will help you. Normally those treatments need to be use for three months and in the meantime it's better not to have sexual relationships, as those creams are based on oil and if used when wearing s condom, this one would have more possibilities of getting broken.
Use some lube if you think that is difficult for you to move your foreskin back. If you have problems to pull it back even when you don't have your penis erected, go straight to visit your doctor.
Circumcision is always the last option.
I was told growing up to pull my foreskin back every time I used restroom. I had issues during puberty. Now all is well.