How much mg should I take for my first time trying edibles?

Ive been smoking weekly for a few months now and I've always wanted to try edibles. For context, I have taken a 5mg edible in the past but I didnt feel anything. My tolerance is pretty low, as I only need 3-4 hits to get high from my pen. If anyone could help that would be sick! I am new to this type of thing.