Newbie question alert! General questions

I am hoping to start a subscription based Saas (i think that what is called) website that allows me to empower music (band directors) that want to easily create and display their original music to the students (like smartmusic but much more simple, cheaper, and more user friendly).
Question 1 - Is webflow a smart program for this?

Question 2 - Will I be able to make the CMS be very user friendly and usable by many different users

Question 3 - Is there a UI kit or template that you would recommend to get me started?

Thank you so much for your time and help!!!