Couple of things: first, if you are based in Italy, it might not be as big of a deal, but you have a lot of unlicensed products (e.g. star wars, game of thrones, etc). In the U.S., it's just a matter of time before you get sued for copyright infringement. Brands have teams of people constantly looking for counterfeit merchants.

Those court cases will stomp you out of business. If you are not behind a corporation/LLC, this could ruin you financially for the rest of your life. The legal fees will crush you, plus you'll lose and have to pay "damages" to the big corporations, which could millions of dollars. AliExpress merchants only have counterfeit products. It MIGHT be legit if it says "officially licensed", but if it's on AliExpress it's almost certainly fake. You either need to partner with a supplier who has a verifiable licensing deal, or you need to establish a licensing deal with those brand names, and make your own products.

Aside from that, two notable things: 1) the prices for everything are quite high and 2) there wasn't anything that really grabbed me. Taking your own photos and making videos of the products can help that. You have good products but the customer needs to say "OMG, that's hilarious! I HAVE to get this!!"

To put those two together - if you want a premium, high quality looking site, you need to have your own pictures/videos, and then you can charge the higher, premium prices. I hope that helps.