You missed a chunk of information; whats a, Home Assistant server and how are they found, added etc.. It's great when you know but for the novice looking at this for the first time it's a stumbling block! Shame.
I do have a playlist on Home Assistant: ru-vid.com/group/PLErU2HjQZ_ZNl8X6P0wAM33bnhd7m2PM6 I'm not sure any are great for an absolute beginner but I do have one on setting it up on an spare PC: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-szxsypKKpZs.html
