Since you let a chatbot write your post, it has a lot of chatbot misunderstandings about how Anki and FSRS work. So instead of trying to answer the chatbot’s confusing questions, I’m going to start you with the basics.
- Read Getting Started, so you know what Anki can do – and Studying, so you know how to use it. Skim the rest of the manual if you have time, so you will know where to find things when you want them later on.
- Enable FSRS.
- Set one short (5m-20m) learning step and relearning step.
- Optimize your FSRS parameters (and then come back monthly to re-optimize).
- Study all of your due cards every day – no backlogs, no long re/learning steps to carry cards over to the next day.
- Don’t introduce New cards at a faster pace that you can keep up with the reviews on. [Expect that your daily workload will be 8-10x your daily New card limit.]
Touching on some of the specific topics –
[2 & 3] I’ve already answered your subdeck/deck-limit questions in your other thread – Confused About Parent vs. Subdeck Behavior in Anki - #2 by Danika_Dakika .
[3] Filtered decks.
[4] Not specifically – but you can control all of that with the pace at which you introduce your cards. Settings for using Anki to prepare for a large exam - Anki FAQs