Dani, it would also help to know about the "fertile window", the most risky days of the month. Ovulation is about 14 days before your next period. Sperm can lie in wait inside for 5 days, but the egg is good for only one day once it comes. There are physical signs on these days like "fertile mucus". Download a period tracker app to understand this better, and no matter what day use a condom. It would also help you to buy some approved lubricant from the same shelf.
His penis would need to go in your vagina for pregnancy. But you sound close to having sex so buy some condoms just in case you get carried away.