Flour tortillas are extremely easy to make and unlike their corn counterpart, they do not require a tortilla press. Tortillas are cooked in a frying pan and since "medium" heat means different things on different stoves, the heat will need to be adjusted based on your cooktop. Start on medium and if the tortillas are not browing and puffing, turn the heat up and bit and conversely, if they burn before they puff, turn the heat down. It's nice to have a second set of hands so one person can cook while the other rolls the tortillas.
Once cooked, the tortillas can be stacked and kept warm in a clean tea towel folded in half. However, do not stack raw tortillas. If you want to roll a few and then cook in batches, spread them out on the counter top. I like to cook and serve immediately but you can keep them warm in a 250F oven (in the tea towel on a baking sheet) if you need a few minutes between cooking and serving.