Hey there, welcome to the forum. There's a lot of guides here that could help you so make sure to check those out in the "how to's" section. One piece of advice I've got for you though, your staffy girl is a bit young for anything sexual right now. Most folks would say to wait until at least her second heat cycle.
The pinned threads (with the thumbtacks) are typically the most useful there. But the most important thing is to pay attention to her, dogs are different and a guide only goes so far. Trust me, happy dogs are the best lovers.
