Interactive rating component solution

I wasn't sure if I should use just buttons or a <form> for this challenge. I used the buttons for simplicity, but if its better practice to use a form let me know. I also wanted to validate that a rating was selected before the user can submit. I'm not sure if that was part of the challenge, but that was one of the first things I thought about. I initially tried to validate the value through JS, than maybe alert the user to select a rating before submitting, but couldn't get it to work, so I opted for making the submit button inaccessible until a rating was selected. That I figured out by googling, and if there is a better way, please let me know since this is my first JS challenge. I'm also concerned about accessibility, and that makes me think a <form> with <input> and <label> would've been a better choice.