Now that I've finally graduated on my SEA account, I may now make a guide for our fellow graduates.
Let's start with what's new after you've graduated under your Sensei.
- The "Collab Missions" is replaced with "Sensei Career".
- The "Master's Shop" is added.
- The "Find Sensei" button is replaced with "Find Cadet" (Well...the "Find Sensei" button is automatically removed once you have a Sensei).
- You are now qualified to recruit Cadets! 
Since you're already a graduate, I don't have to show you how to navigate there. Let's jump straight to that section.
Meet my Cadets! 
Wait...this feels familiar...Well anyway, let's get back to the topic.
You may have noticed that there are 5 buttons now instead of 3 at the bottom of the screen.
Those 5 buttons use is as follows:
Sensei Career - is basically a ranking system where if you've accumulated enough "Sensei Reputation" points or "Sensei Rep" for short, you will be granted a higher title than your previous one. Of course, there are respective rewards that scales with your Sensei Title.
Sensei Ranking - this section will show you the Top Senseis of every cycle. After becoming a Sensei and received enough "Sensei Reputation" points, you may now join the Sensei Leaderboard.
Master's Shop - is where you can spend your "School Inspector Emblem" on to buy various useful items ranging from consumables to aesthetics. You can also access this shop by going to Supply > Shop > Activity Shop > Master's Shop.
Application List - is where you can find Captains that have applied to be your Cadet.
Find Cadet - if Cadets can't find you, then you can find them instead. Now when accessing this section, you will be greeted with 2 more buttons.
Personal Info and Find Cadet.
Personal Info is where you can fill out your resum- I mean Sensei Info in order to attract potential Cadets. Don't worry! It's mostly general information about you.
Find Cadet is where you can recruit potential Cadets, of course, you can also recruit Cadets from the World Chat and Armada.
Moving on. You may have also noticed this button as well. This button is for "Collab Missions", as a Sensei, this button allows you to monitor your Cadet's progress.
Well you know the drill. Collab Missions consists of 2 more sections, Examination Trial (which can be completed independently by the Cadet) and Daily Teaching (some missions can be completed independently by the Cadet and some needs to be completed together by both Sensei and their Cadet).
While this button lets you access the "Special Bond" section.
Where your Sensei will mostly benefit from, regardless of your progress which means your Sensei will receive full rewards. It's basically a way of saying "Thank you very much" to your Sensei. 
FAQ: (Frequently Asked Questions)
Q: Do you need to be very active as a Sensei?
A: No, you don't have to. Just play like you usually do. And when your Cadets asks you a question about the game, just try to answer their questions as accurate as possible.
Here's the link for the previous guide:
Honkai Impact 3: Sensei & Cadet System #1 - HoYoverse Player Community (hoyolab.com)
Note(s):
- You may only have a maximum of 2 Cadets at a time.
- You can find potential Cadets in the World Chat and Armada as well, so make sure to turn on that seeking tag. And of course, don't be shy to chat, ok?
