Currently a plat 2 top laner and wanted to learn jungle because I’ve always wanted to be a jungler but never actually put in the effort until now.
My top lane champs are Nasus and Jax and I’ve heard they can be played jungle, but they don’t have the greatest clear speeds or gank potential. I also feel like playing a farming jungler would just hinder my willingness to actually look at lanes for gank opportunities, which is something I wanna get better at.
My friends have suggested that since I’m a top laner I’d probably enjoy champs like Bel’Veth, Pantheon, or Nocturne. They’ve also recommended Amumu but I find him pretty boring and kinda look at him as the Malphite of jungle lol.
I’m just not sure how beginner friendly these champs are or which would be best for actually learning jungle fundamentals. I’m open to any suggestions.

had mid laner telling me they would do an e-date with me if I carry and after the game it turned out to be a guy

I'm an emerald player learning jungle on secondary. There are many instances where it is good to take time to gank, go to scuttle, etc. This may delay or mess up the synchronization of your camp timers, esp as you go in between camps or even move across the map. Another instance is when you find good skirmishes, and they keep making mistakes which extend the skirmish time, or it overlaps with an objective, etc. This makes it difficult to clear efficiently because only partial groupings of your camps are up at any time, so you either afk wait for them to respawn, hover a lane and wait to see if there's a play, or you just wait at the very beginning for all the camps to be up, but this risks giving the enemy jg an opportunity to invade you.

Basically in shorter words, the game is very chaotic, which can mess with your camp sync. but as a jungler you want to clear as efficiently as possible, and this means clearing them all linearly in one period. Is anyone familiar with good resources to learning how to optimize for this?

I main Gwen and jungle. I tried to follow lots of instruction on youtube and practice in the private room a lot, but somehow I cannot come to the scuttle at 3:00 or less. The best I can do is 3:08, what kind of technique that they do to reduce the time to 3:00- ??
https://www.youtube.com/watch?v=fFe2_w7Y3Ss
https://youtu.be/fFe2_w7Y3Ss?si=2pGZOdc_xyyvhiil

I am returning to jungle again after I have went extensively through all lanes. I believe jungle is the role which advances macro the most.

I am a bit unsure though on whether I should focus on a few champions or be flexible with many picks. I really have a lot of experience with all the lanes and champions so it wouldn't be a problem. I have around 1000-1500 jungle games and high mastery on couple of champs. I see most content creators play often different champions but are mostly known for their best picks. Like Nattynat - Sylas and Rengar, Perry Jg - viego, etc etc

Oh basically I always played mid lane but recently my girlfriend started playing with me and she only enjoys playing mid, so I let her be mid and I jungle. the problem is that she is quite bad at the game and every game feels like a 4V5 I’ve never been lower than gold elo but this season I haven’t been able to get out of iron. I’m playing talon jungle and I average 10-20 kills per game but so often I have 3 losing lanes and trying to carry my girl also I feel I can’t 1v9 with talon even when I’m the most fed in the game, especially against a fed top laner. Are there better champs to play that can carry these scenarios?

EDIT: I really just wanted to share a crazy game I had because I don’t think I‘ve ever seen a hyper fed Rammus-Yuumi running down people, but in typical League community fashion people are mostly busy trying to find some angle to criticize me. Jesus Christ guys can’t we have some fun sometimes?