Affixing microcontrollers

Hi all, Very noob question but if I am putting a few microcontrollers / maybe a raspberry pi zero in an old bit of kit, what’s the best way of affixing them securely? My current method was to get a flat bit of ply secured into the unit and then attach the boards to that I have standoffs but I can’t see how you attach standoofs to wood I bought some pcb feet but I can only find m3 ones and many things I want to attach are m2 I’m now thinking of screwing a bit of pcb board to the wood with screws and seeing if I can get the standoffs to screw into that I feel there must be a standard way to do this, what am I missing?

i used ply wood in a recent project, it was a 4mm one and i didnt have any screws or anthing for it so i just used akfix glue

to be honest its not a bad solution as long as u dont plan to take it out or change stuff out

I make threads in the wood (plywood) and that works well as there is close to no mass in the Zero.

How do you make the threads?

Actually I just tried drilling a small hole and screwing them in which worked great

yea thats the best solution, or self tapping screws

With a "Threaded taps"