After the incidents regarding the Election and Gon's recovery, Canary and Amane visit Gotoh's grave. It's revealed that the Kiriko's son is seen posing as Gotoh. It is implied that the Zoldycks recruited the Kiriko to keep Gotoh's death a secret from Killua and Alluka.
https://hunterxhunter.fandom.com/wiki/Gotoh
Your third point is an easy one. Get a Crunchyroll subscription. It's very cheap per month and it is THE place to watch anime. Nothing else comes close. March Comes in Like a Lion is streaming there.
https://beta.crunchyroll.com/series/GRVNXWQZY/march-comes-in-like-a-lion
I hope you continue to enjoy your anime journey. It is an amazing one.
I could recommend so many, many more. You might try Made in Abyss next if you get Crunchyroll.
If you stick with Netflix, you cannot beat Demon Slayer. It is a fantastic story, great animation and wonderful characters that you can care about.
Sword Art Online is easy to recommend.
Kotaro Lives Alone is a new entry that I really enjoyed alot. It's short, so an easy watch.
One Punch Man is one of my very favorite anime, that I have watched 3 times now.
Violet Evergarden is one of my top 20 anime. Wifey really enjoyed it too.
That should keep you busy for awhile. 
When you run out, I can give you more.
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