Welcome, glad to have you!!!
I suggest that you look around the forum to try and improve your stuff, but it is probably as simple as putting a layer or two of aluminum can on the bottom of your hop chamber to push it upwards.
I also suggest that you make an ejection port cover, Blind Sniper cylinder guide sleeve, and the SS-arm that's in my signature as they will help with longevity, air seal, and range/accuracy.
Besides that, polish or lap your barrel or get a new one, and make some barrel spacers out of painters tape and foam.