There is no need to buy premium version if you’re looking for only shop sidebar.
I guess you’re using the Elvinaa Plus theme. You can simply go to Appearance -> Widgets and then add widgets to the WooCommerce Sidebar
If you’re using Filter Products by Price then you should have at least two products of different prices.
For the Filter Products by Attributes, You should add attributes to the products first then, select the attribute from the widget settings.