It seems you are starting to talk to yourself so, let me join the conversation.
It sounds like you already have your first 5 or 6 so, the second 5 or 6?
As I don't know what's available in Greece, I can't be much help with your quest for names. Eventually, you will discover you have run out of space - it always happens. Then, you will have to decide to give up your bedroom or limit your plant collection.
So begin your collection with "love at first sight" plants - don't buy every succulent you see. As you become more knowledgeable, you will discover you lke some types of succulents better than others. At that point, don't hesitate to 'gift' those first plants to friends. Eventually, you will have a collection that won't eat your house but that you will love.
Behind glass, sun is best and may not be enough, depending upon the direction your window faces. In the winter, water less. The thing I love about succulents is that you can feel them and tell if they need a drink. (Cactus are that touchable). Feel the leaves, squeeze gently. If they are soft, water. If hard and slick, no water. Very soon, you will just have to look at your plants and know who needs a drink and who doesn't.