Returning player with fresh 60 questions and more!

Came back after pre-VoH and wow, I am having a lot of fun. I have been slogging it through PoE2, and while I do enjoy PoE2, D4 just feels like home, especially as a 'dad gamer' with no kids. IE: old.

Anyways, I followed a simple guide to push me in the direction (Spiritborn Quill Volley) and leveled 1 to 60 in the VoH campaign on normal.

I see that some difficulty levels are locked out, I've got a few questions:

Do you switch from normal to a harder level immediately at 60? Or do you get some paragon points first?

How do I start unlocking the harder difficulties, is it different than it was before? IE: 2 capstone dungeons I believe. I can scale only to Pentinent right now in terms of difficulty, but am told I should be in Torment 1 at max level?

Any suggestions on where to start/go in terms of difficulty levels and such as a fresh 60 would be welcomed, thanks!