Hello, welcome, and thanks for your enthusiasm and edits! I do want you to know that I reverted your edit, turning Wilno into a redirect. The Wilno article has content and can't simply be turned into a redirect, which means that people who search for the article will never see the content. On the face of it, I disagree that Wilno should redirect to Vilnius; instead, an "other uses" link should be created for the Wilno article, directing interested people to the Vilnius article (I'd make the link myself but I have to check exactly how to do it and have other things to do in real life at the moment, like get dinner and do laundry). But before making these kinds of major edits, it is good practice to discuss them on the talk page for the article in question, namely Talk:Wilno.
Thanks a lot, and happy editing!
All the best,