Negotiating margin at the dealer

Hello together, I’m just looking for a car and I’ve also found one that I like. It’s at a dealer and the days I’m going to stop by for the test drive. Now the Seat Ibiza is available for 13,99€, it’s a new car. Now as a woman I don’t have a lot of idea of cars – which is why it should be a new car – and ask myself how much the price is still negotiable. I would like to have winter tyres, for example, and it will be I’d like to hear about a connection guarantee after the 2 year manufacturer’s warranty in the description text. As I have no idea, as already mentioned, I would be interested in the experience values. Some of my friends said that it’s not bad if I go there alone as a woman. I see this differently and don’t want to be dragged over the table at a dealer’s… Do you have any tips? LG