Electric coffee grinder….

Then use a cheap amazon filling kit.

Capsule Filling Machine Kit for Pill Filler - Micro Spoon Spatula Tool for Gel Capsules Fast Fill Tray with Herb Powder Tamper Tools Sizes # 000 00 0 1 2 https://www.amazon.com/dp/B08PF7KW1W/ref=cm_sw_r_cp_api_i_03VMEMEQRZNFRYMFN4X1?_encoding=UTF8&psc=1