Selling online course

Slms if a female is selling an online course on certain subject but she is not showing her face or photo of her self. She is only showing course material on the screen and It’s just her recorded voice. It’s a prerecorded course so no live classes. Can her audience be male customers as well as female or can this course only be sold to females.
Pls advise jazakallah.

Wa alaykum salaam,

Yes, she can sell such courses.