Loads of tips here... Do you want to do it outdoors? Then you should wait for longer nights, as the emulsion likes to harden for ~10 hours (I coated in the evening and exposed before sunrise, even though I had the walls covered in black fabric).
And then you have to find a way to rinse it with the chemicals. I used the 5l pump-spray bottles for gardening.

I'd start with applying it to paper or such; you can work in red light and put it somewhere dark to dry.
You can apply it using a soft brush. Make sure you don' paint it on, but coat it with a thin layer. Pouring it is an option if you coat something flat.

One tricky part is that you have to warm up the emulsion. This is done best by placing a container with the emulsion into a bowl of water of ~40 C°.

Feel free to ask any question.