Question regarding immersion

I've read that immersing oneself is useful, as the brain starts picking up details on word usage, grammar, etc. Is that the case even if you can't understand? In my personal case, I think I might be around N5, very elementary N4 levels, since I've been focusing mostly on vocabulary rather than grammar.

When I put on any native-oriented content (ie a podcast or anime episode), however, I can't make head or tails of it, except one or two isolated words here or there. Is listening to such content useful, even though I don't understand it? Or does it get better as time goes by? By which I mean: should I keep listening to native content in addition to what I'm doing, or is it better to just focus on improving grammar and vocabulary?

Thanks a lot for your help 🙂

by FaallenOon