Managing website without coding skills

My website was built for me and has been up and running for several years, however, I am no longer able to pay a designer to make the changes that are necessary from time to time as my business changes. The theme its running is “Etherna” and I cant figure out how to make layout changes myself. The static pages are more important than the blog as its a business site for solar installation.
I’m considering building a new WP business website from scratch but will need a theme that I can manage without coding know how.
I’ve searched the internet & found a few, Headway being my first choice at present.
I wonder if anyone has been in my place and would care to share their experience or recommend a theme I could manage without knowledge of coding.