Hey welcome to Hive Marko, you made your first post!!! And it's great to find out more about you.
You have a lot of interests, that's great as I'm sure you will have plenty to post about on Hive. Check out all the relevant communities to post from the right place to reach the right audience and engage with like minded people. That will help to expand your network. For example, haveyoubeenhere (for travel and make sure you check it out!!! 😀), amazing nature, fascinating insects, photography lovers are all communities that would be useful. I'm not sure about astronomy, you can check and see if there's any relevant community.
You can also add the introducemyself tag to cover all bases, and maybe croatia in case anyone from Croatia monitors newbies joining. If you have any question, feel free to ask.
Have fun on Hive!!
btw, you may want to check this..
Thank you very much for advice. I will check tags and communities.
Ou, must be problem in upload, I will check it up.