Be direct, honest and keep it simple. That means, (1) be very clear on your abilities and expectations, (2) don't make them loose time, and (3) if you want to k

Be direct, honest and keep it simple. That means, (1) be very clear on your abilities and expectations, (2) don't make them loose time, and (3) if you want to know whether they are looking for / would be interested in someone like you for an internship or not, just ask.