I mighta misunderstood what you want; freetube gives good & relevant recommendations if you've selected a video, like you're watching something and then you see related stuff in the sidebar.
if you want to open freetube and then it recommends you things to watch, unprompted, that's not a thing. honestly, wouldn't want that to be an option at all.
when you turn off the "viral" shit, block a buncha slop channels (super easy - stupid face in the thumbnail? blockety block) and make your subs the home page, it becomes a joy to use.