I don’t know which type of skateboard suits me

For most well-known brands, there is not a significant difference between 8.0-inch complete setups. In reality, there are many factors such as the shape of the nose and tail, the concave (the curvature where your toes and heels sit), and the wheelbase (the distance between the trucks). However, these details only start to matter once you reach a certain level. In the beginning, it is perfectly fine to choose based on the graphic you like. That said, very cheap boards sold at hardware stores often lack the minimum required durability. Even if you buy online, make sure to purchase a complete setup from a specialized skate shop.