Question about starting a painting hobby

Hello, I'm new to Warhammer, I need some advice please. I'm really interested in painting a figure, but I don't know where to start and I don't want to spend a lot of money because I'd like to try it first and then see if I like it. My budget is about 40 to 60 euros, but I'd like to have a good result for the lowest possible price. So if anyone could tell me how to start or give me some advice please.