Nasus Jungle Build Recommendations & Advice

I’m a mid main and I’ve gotten bored of the repetitiveness of it, so I’m trying to learn jungle more since it’s my 3rd best lane(support being 2nd). I tried a few junglers in PVP and I’ve epically failed for the most part, I tried fizz, I know he’s a great JG but I think I’m so used to mid laning with him I just can’t break out of it, tried VI and can’t seem to figure her out for some reason, along with a few other champs, but I see myself having the most potential with Nasus. I was trying to learn him in Baron lane but early game I struggle too much with farming and I’m left behind for most of the game, last hitting minions is hard for me with melee champs, with Nasus even harder since he damage spreads to multiple minions and I need to last hit with the one specific ability, but jungle is also just more fun.

Aside from the word salad above, I’ve been using the preset build, I’m wondering if there’s something else I should be using, what champs counter me and what I can build against them(I’ve had a problem with volibear and chogath so far), and any other advice.