I followed quite a few tutorials.
Doing it inside on a piece of wood is quite easy. You can work in red light.
You take about 1-2 spoon of the emulsion, put it in a bowl that sits in warm water, wait till the emulsion turns liquid, and then either paint it on in two layers (wait for 20 minutes inbetween), or even better, coat it, which simply means you paint a thicker layer. You could even pour it, but you will get one thicker corner (the one you use to pour the excess emulsion off). Do not pour the rest of the emulsion back into the bottle, it is waste.
Then you should let it dry, 24h might be good. If you use a light tight box, make sure to open it every few hours so humidity can escape.
Also: Make sure to coat quite a few extra pieces for your test strips.
Developement: After exposure, if this is your final piece, maybe consider soaking the wood in water before developement. This way, no chemistry can be soaked into the wood.
Then proceed with normal developement (tray or spray) and you are done. Agitate/spray carefully so the emulsion does not come off (but it should stick quite well to wood).