I had a really good experience with LingoDeer in learning the foundational N5/N4 grammar. The lessons are broken into pretty short, digestible units. Each one has a sheet of notes you can read, but it teaches you the grammar through lots of example sentences and a variety of fun, interactive exercises. You have to pay for it beyond the first few free lessons, but for me it was worth every penny.
I do also use Bunpro - but I didn’t really start with it until I started getting into N3 grammar. It’s not the best way to learn grammar you’re seeing for the first time; it’s really more to help you review things you’ve already learned with the structure of an SRS system. That’s not to say you COULDN’T learn from Bunpro, but at least for the really foundational stuff, it may not be the best approach. It does however give you links to a variety of articles/videos for each grammatical construction. You can easily pair it with Genki as well, but if you have no time to read Genki in the first place, I don’t see how that will really help you.