Hi keirarounds welcome! It's great to hear you're working hard to learn online sales. Remember, no one was born an ecommerce expert. It's doable!
In regards to the table, I did some research and it looks like more merchants rely on an app like this to create one. However, before you pay for it, I'd suggest reaching out to Shopify support first. Your Shopify account comes with 1 hour of free design time, and this might fall under that. I can not confirm 100%, but I think it's worth looking into first.
Hope that helps!