Go to the patcher (at the bottom of the screen) and follow the instructions. Make sure you select the YouTube APK file you downloaded previously from storage. Enable at least the "Vanced MicroG support" and "Disable Shorts on startup" patches. There are also patches for disabling ads, shorts, showing an estimated but accurate dislike counter ("ReturnYouTubeDislike") and automatically skipping sponsored segments ("SponsorBlock")
Click "Install"
Download and install Vanced Manager (it's discontinued, but you can get it here)
Fire it up and use it to install Vanced MicroG
You're done. You can now uninstall all the apps you installed except Vanced MicroG and YouTube
Invidious instances recommend stuff based on what you're currently watching. Just start with one video and go from there. The Featured page is probably based on what most people using said instance watch most.
Some instances don't even have a Featured page, just a "blank" search.
Invidious lets you watch youtube outside youtube. No ads, no tracking and some instances let you download the videos. You can use any watch?v=993939 link with any of the instances and it'll work. Example:
If you're on Android check out ReVanced. It lets you patch YouTube to disable shorts and even get rid of all ads, bring back dislikes, and sponsorblock. Just have to get an apk since it can't handle stock installs, and also microg_vanced for login. No root required.
ReVanced (manager) is the program name that creates changes in the YouTube program. apk is the android package format. Like an exe or msi file on windows it installs the program. Sponsorblock is an addon that uses community submitted timestamps for videos that tells it where sponsorships, music, intros, outros, subscribe reminders, etc are in the videos and can be set up to automatically skip them.
It's just an option given during the patching process. I'll send you a link to my private server so it's not hammered. It'll have all the files needed to get going. Let me just make sure to update it to the current versions.
I'm not a programmer if I haven't made that clear. I'd rather deal with the ads and sponsors and invasive shorts than risk exploding my phone by miscoding something.