welcome
You did a very simple introduction. Feel free to do another one sometime with your photo(if you want to share it) and a paper with your name @jachu on it....date too if you like. And include even more information about yourself in that Post. Maybe do it with English AND Polish. There are others from Poland here and you need to make friends! ;-)
I have a few tips for you:
find a community. Maybe join the @minnowsupport project.
don't plan to get rich. If you come for money, it will be a struggle.
it will still be a struggle when you are new.... for 2 or 3 months. You need to go meet people when you find their post that you like, and comment what it meant to you.
only Post original work. Many new Steemians get into trouble when they copy and paste things from Google or from the internet, AND IT IS NOT their photo, writing or work. IF you can't post your own things, better not post.
comment and make friends, but don't ask "Follow me" or "please Upvote me" Maybe after you have become friends... maybe. But never as your first, second or third comment to them. Never!
have fun!
I am a community volunteer. I try to stop SPAM and trash and things that hurt Steemit. IF you see anything like that, please feel free to let me know, I will look into it!