This is the inherent characteristic of all OPNs, it lets you hear everything. It may be annoying at first, but it’s not any different than what a normal person hears, everything. So just give it time and eventually your brain will get used to all the sounds and will learn to tune it out.
If you wish to be in a cocoon where you don’t hear anything except what you want to hear, then the OPN is the wrong choice for you. I’m not really aware of any adjustment you can make to tune some sound out but not others. No hearing aid is smart enough to read your mind and know what you want to hear and what you don’t want to hear anyway. Let your brain read your mind (it’s the only thing that can) and tune sounds out for you.