Need help with handling multiple areas of japanese at the same time

So I watch and read a variety of media and I've been thinking about how to spread out my time. Do you guys think it's smart to spread out your time on different topics/areas or focus more on one?

Current issue: I'm watching Ozark dubbed, playing the witcher dubbed, watching electronic engineering videos and バキバキ童貞 (bakibaki doutei) youtube videos. My problem is that these are all difficult in different ways and thus I feel as if improvement is held back since I, obviously, am not focused on one aspect.

I would like an input from other people as to the difficulty of Mr Bakibakis videos as I can often times clearly understand what's being said if I read the subs as opposed to only listening, I worry that my listening cababilities are shit or maybe it's just quite difficult.