So you want to sell stuff...well stop wasting your time fiddling about with the awful classic template (its only there because "something" has to be there) and get busy doing what you can't subcontract: writing good product descriptions, getting quality images and loading the products in a new installation on your local development server.
Pay a designer to design the look of the store, forget bells and whistles, do clean and clear. This is not ZC -specific, Zen Cart can be made to look (maybe not behave) like anything you want.
Pay someone who posts questions and answers on this forum to code the template for you on their server so you can see it.
In the meantime learn about how templates work and do some fiddling about, to understand about overrides and core files so when the coder has done the template and sends you the
template files (to be dropped into to a clean zc install) you'll be able to understand if they have done it right (using overrides) or hacked it (changed core files).
When you have finished preparing your products/have enough things for sale to not be embarrassed, deal with your hosting and SSL, payment methods, shipping methods and start making money.
Zen Cart and the DIY approach is a long-term relationship, technical knowledge of html, css, javascript and php will come along the way gradually as you chip away at the minor things you want to change, but if you are serious about business, be business-like and spend your time doing what only
you can do, get others to do the initial heavy-lifting so you can start selling sooner.