New to Storefront

I am about to embark on trying to create my own store using Storefront. I am starting to get the idea on how to change various things, but I think I may need to purchase some extra plugins, and here is where my question lies. I intend to sell approximately 50 products in each of about 5 categories. I want to be able to go from the Home page to any of the category pages, and from there see and choose from all the products in that category. I would also like to have different menu options based on the particular page I am on. I have looked around and see that there are heaps of plugins that I think may do the job, but they all cost money. Now I have no problem at all with paying, but I don’t want to pay money for something and then find either I didn’t need it, or it doesn’t do what I want. Could someone please give me some direction?