Yes, it will do. You just need to be able to set it up, it won't be easy to figure it out right away! A lot of interesting things, nothing superfluous.

the fact is that the archive contains not only the theme, but also a bunch of other files and folders. When installing, of course, wordpress does not see your stylesheet.

1. You need to unpack the archive. there will be a Theme Files folder in which there will be two folders with the theme. Use ftp to upload to wp-content / themes and download both the flatsome and flatsome-child folders there.
2. either make the theme files folder an archive and specify it as a theme in the WordPress console as an installation file
Good luck.