Trying to take this on yourself with no knowledge at all is a BIG JOB!!! You need to read and understand a bit about some basics before you do anything. WordPress certainly is alot easier than learning html coding, but unless you want to stick exactly to the template you have chosen, you are going to need to know how to create a child theme and edit the style.css
The basic wordpress gets you started, but you do need the additional plugins to make the site really function well.
The ones I always start with are:
Google Analytics ( You need to sign up with them first...it is free)
Google XML site map
Fast Secure Contact
Google SEO by Yost
and others I use: Custom Post Order, Add to ANy Share Buttons and Back up WP AUTO.
Those are a good start for beginning.
If you can, I really would suggest you search for someone who can build a basic site for you and then give you some instructions on how to use it. That is what I do for my local clients. They sit with me at their computer and I give them a tutorial. Very basic but enough to make it comfortable.