It's not really necessary or even beneficial to do "full immersion" everyday if you're still at a very low level and it takes you a long while to process even basic sentences or get confused by slightly beyond basic level grammar-related stuff. I believe it starts to clear up as one starts to gain a steady base of easily comprehensible material to consume (both listen and read) on a daily basis.
I know from my experience that I remember that I couldn't really understand Japanese Wikipedia articles or news articles back at the beginning primarily because I was not yet used to the way Japanese sentences are structured (I had some vague idea about verbs being at the end, but wasn't really clear about how the whole nested clauses thing worked), but I would say it started to clear up by doing extensive amounts of reading practice, usually only around two hours a day, using material like visual novels and light novels.
Although one might be easily lured by the idea that reading more is always better, for people who lose focus after a certain amount of time, it might be better to try to break up reading or listening sessions into "small" chunks (by this I mean like, an hour in the morning, an hour in the afternoon, and an hour right before bedtime). Otherwise, it might just end up getting all mushed together in one's mind and one might miss on important details due to having one's mind carried away by other thoughts or just having everything blending together.
Fiction can have an impressive vocabulary range, and it's possible to encounter terms related to warfare, law, crime, biology, or psychology in different works of fiction, so I don't think it's necessary to go deep into exploring all sorts of different subjects in one language just for the sake of learning words like "trench" or "giant squid".
Don't take my word for it tho.