OpenCart Community

Hello i am new to opencart. i have some question about a module to use i will describe below. my eshop sells bracelets necklaces and rings. i have a top menu that has categories Men women bracelet necklaces rings bow ties. Inside Men categories i have subscategories bracelets necklaces and rings that i want to show only products for men. the same inside the womens category. also when i enter a category for example mens bracelets. i want a side menu that i can filter products by material or color. can u provide the best solution for me?

Secondly one module to put a link in the product like a note that the frontend (customers) cannot see that i put some link that is only visible to me the admin (i am dropshipper). thanks in advance