Using a dildo for the first time

Okay guys so I was looking for something earlier I found my moms dildo and I really want to use it ! Is their any way that I could get a disease or anything ? How do I use it and what do I need to do because this will be my first time using one ? Pls help ! I’m only 15 and I’ve been sheltered my whole life so I have just learned things on my own so please help me