play ranked. You get extra drops there. Also put on some champion status for additional drops/drop chances. But if you want to farm a certain helmet you might need to check first if you can even get it at your current Rep. https://forhonor.fandom.com/wiki/Gear#Nobushi
I think you are a bit low atm repwise. Since it is rare tier gear, it can drop, but on rep 1 you are mostly still getting common gear. You can rare gear to drop more often from Rep 2 onwards.