I had some initial problems in the beginning, because I was used to linear note taking apps like OneNote or Joplin, but once I watched a guide on how it works, it clicked and now it’s my second nature. I even began to write my hand written notes in Logseq style!
TL;DR, if you don’t wanna watch any guides/ read docs:
Indentation matters. Logseq works with a parent-child hierarchy
You usually don’t open or create new pages, you write everything in your journal and link stuff there.
Use links, either with [[Link]] or #Tag, which are the same. They crosslink different topics and reveal connections.
Make use of plugins. There are thousands of it. Especially the Graph Analysis plugin should be included by default.