The C3D has 2 PWM connections which should work with that or can be made to work with minimum components of maybe a resistor and some wires.
But if you do not know what is meant by a “pull up resistor” and have never heard of an “FET” or “MOSFET” then you are looking for someone to give you step-by-step directions and if done incorrectly might ruin your $330 diode.
There are Arduino learning kits which would teach you some of the basics of electrical components, signals like PWM and about resistors, switches, etc. IMO anyone who is doing anything with these hobby lasers should do a few of the Adafruit learning kits for Arduino just so they understand what’s going on at the most elementary level. And it’s far cheaper than burning up a C3D board or worst, any other part of these lasers.