I have the SX Turbo and these are the steps that I follow most of the time. When my wife is with me, she even reminds me of the following steps. Just like the checklist the pilot and copilot go through before flying the aircraft.
1) When in the garage, open the garage door. (Skip if already outside ready. Proceed to 2)
2) Step on the brake and push the Start button.
3 Press the Confirm on the Enfotainment screen.
4) Press the ISG button to disable the disable the engine from turning off at stops.
5’ Press the LKA button to enable the Lane Keeping Assist feature.
And on a long trip, 6) Press the Cruise button to get ready to Set the Smart Control when at cruising speed on the highway.
7) Press the Auto Hold button.
Note: some buttons may not apply to other Seltos trims.
Haha.

We just got our Seltos 5 days ago and I'm still trying to learn all the buttons and features after having a "technological stone ages" 2009 Buick for 12 years, but this is my current "pre-launch" checklist:
1. Press lock button on door for safety reasons (since it doesn't automatically lock until you shift out of park...but the default setting in the Doors menu was worse, it didn't automatically lock until you are going 10+ mph). Yeah, I live in a high crime city.
2. Buckle seat belt
3. Put key in ignition, start engine (Seltos S has a key ignition, no button)
4. Press Confirm on the Infotainment screen
5. Press the ISG button to disable the engine from turning off at stops.

(Why can't we permanently disable this??)
6. Plug in phone to USB cord for Android Auto
7. Screens says "Reading USB"...hopefully it connects.
8. Press Android Auto on screen.
9. Bring up Youtube Music. "Youtube Music isn't working right now." Umm...OK, let me open Youtube Music app on my phone.
10. Press Youtube Music again on infotainment screen. It comes up, but oops, my playlists aren't there for some odd reason. (Maybe it's because I have too many playlists? I have like 150 playlists on Youtube)
11. Unlock phone, bring up Youtube Music app, find my playlist, press play
12. Playlist is playing in the speakers. Awesome! "OK Google...give me directions to" Oh crap..."Android Auto has disconnected. Reconnect USB cord." And I just bought a super high quality $10 Anker USB cord.
13. Unplug USB cord, plug it back in. Android Auto working again.
14. Press Android Auto button on screen.
15. Get the playlist I want playing in my phone's Youtube Music app.
16. "OK Google...give me directions to blah blah street."
17. Launch countdown started.
Honestly though, I'm really liking our new car. I think I'll get the Android Auto thing worked out eventually. I think mine can work wirelessly, but I don't have Android 11 yet on my phone, so until then it's USB cord.