Should I continue ice-skating?

Hi! I'm a female below twenty, and I recently joined learn to skate. I did my first lesson recently, (yes just the first one) and I have some concerns and I'm reconsidering if I will do the next ones. Starting off with some basic facts. Although not medically diagnosed, I do believe I have weaker bones, and I'm slightly underweight. I'm relatively active, 10-20k steps a day on walks, and I do pilates and weights here and there. My recovery time takes slightly longer then usual for people my age. Now, to the lesson. We got 30 minutes practice beforehand, and I fell, a couple times as expected, but I swear to you, I felt like my leg/knee was going to break one time, and actually thought it did. Luckily I was fine, and able to finish the lesson, but my knee/Leg has been sore since, and I do believe I was lucky and it might've gone worse. So, my questions are,

1. Is this a normal experience? And I'm just nervous? Maybe it wasn't as bad as I thought, and the nerves merely made it feel like that?
2. If not, should I drop the class? Its really disappointing, but if I really can't do it because of my fragile bones, then I don't want to push it. Any personal experiences or information you feel like sharing is welcome! Extra info - The class teacher was great, and taught us how to fall, walk across the ice, etc. So its not due to a bad teacher, if anyone considered that. Secondly, my bones/weight is not like some family passed down issue, or anything of that sort. In other words, it is not a huge genetic defect, or I wouldn't have even considered ice skating.