Build a website

Hello Freelancer, my name is Bernd from Promatco, Costa Rica. Our Website is [login to view URL] it is outdated and needs a new concept. I like Wix for the possibility to make change later ourselves but I am open to other solutions. We have 11 product families with about 40 Sub Categories and a total of 350 items, thereof about 30 repeating. 200 items could be sold with e-commerce, the rest is too technical. We could start with 50. The majority of items has a Technical Data Sheet attached, sometimes also a MSDS. We have both available. The second phase later includes our applications of the products with short video clips. Any idea how to get that into a nice Web Design? Thanks in advance.