Here’s what we did: https://www.frugalfamilytimes.com/2018/06/how-to-make-faux-brick-wall-look-real.html?m=1
Hi Margaret, here's a lovely video that will show you how to paint your faux bricks - https://www.youtube.com/watch?v=gmoJz0nrVbw
Hi! Royal Design Studio Stencils has a faux brick stencil with a video tutorial!
I would make sure you have a stencil that is in the shape of brick, here is a stencil post I did with a stencil of different shapes that can be used on a wall. https://www.simplenaturedecorblog.com/diy-stenciled-picnic-waterproof-blank