Hello Karolina, and welcome to dA!
I'm Laura, aka Lilith-the-5th, and I've been around this site for several years now. Nice to meet you!
I'd spend lines and lines to talk you about dA- if you need any help with its features and the community, feel free to ask!
In the meantime, I took the freedom to fave your piece- I love the mood and style of your speedpainting. Keep it up!