Do you think is necessary to go to prenatal classes?

Bárbara • I'm 28, and I have a beautiful baby girl born on May 30th, 2017 ^^ I also have a dog named Oliver and I love him lots!
I'm a first time mum and I don't know if it's really needed, also I know my bf won't have time to go with me because he works far from here and I don't know if I can go alone. In my town there's only classes twice a year and this year it will start in march, when I will be 7/8 months, is it too late to go? How was your experiences in those classes?