How much should I offer for private oil painting classes?

I’d love to learn to paint Impressionism art with oils. I was going to sign up at a school for a 6 week course (few hours weekly) but I ran into an artist over the weekend and she offered classes.

I wasn’t in love with her work, but i figured it’s not a bad idea to have private lessons to start.

She hasn’t taught privately before. What’s a good price per hour or lesson to pay?

Or would it be more beneficial to be in a classroom with others learning at my pace?

Thanks !