0. Lost my warranty. Prepared my mind for Note-9-brick.
1. Flushed LUC-N960NKSU3DTC4 official 4-flie firmware through Odin3_v3.14.4. Got it from samfrew.com . Sellected "CSC_...", but not "HOME_CSC_..." file. Do not flushed "USERDATA_..." file. (It was 5-file firmware to be honest). Also tried fresh november official firmware, but got endless bootloop after flushing nethunter kernel. There was "Auto-reboot" and "F. Reset time" option flags enabled in odin (default ones).
1.1. To enter download mode you need to power-off dedvice. Then connect usb cable from odin-armed PC, while holdin pressed vol-down+bixby keys.
2. Boot to system. From here onwards there may be case, when boot flash screen stalls forever with blue LED fading from lightblue to deepblue. In that case, just force reboot, holding vol-down+power keys. Also there might be few reboots, looking similar to bootloop, but if you count less than 5 sudden reboots, just let em go.
3. Skipped all the setup steps, except Wi-Fi connection. Skipped google acc, samsung acc and whatever.
4. Wait all the updates in status bar.
5. Finished device setup, appearing in status bar. Yet skipping all steps.
6. Flushed twrp-3.2.3-0-crownlte_UNOFFICIAL.tar.md5 through odin. From the "AP" slot. The "Auto-reboot" option flag in odin must be unchecked. After "PASS" notification appeared in odin, hold vol-down+power keys till blacck screen, then rapidly switch fingers to vol-up+bixby+power keys, till samsung logo appears, then release power key till TEAMWIN logo appears, then release all the keys.
7. Wipe -> Format data in TWRP.
8. Reboot back to TWRP
9. Flushed respectful N960_F_DS_N_DrKetan_custom_ROM_Q11.zip through TWRP. File was on SD card. To find it in TWRP go to "../external_sd". I've also choose to flash SM-N960F CSC instead of SM-N960N in aroma installer.
10. Reboot to system, skipped all the setup, except Wi-Fi, wait all the updates in status bar, finish setup from status bar, but skip all.
11. Entered Magisk manager, disabled notification toasts about root priviledges.
12. Entered "ROM Tool" app, provided root priviledges, applied essential fix.
13. Reboot back to system, then reboot to TWRP
15. Flushed respectful kali chroot ( nethunter-2020.4-generic-arm64-kalifs-full.zip ), reboot back to TWRP
16. Flushed respectful kali kernel ( Nethunter-Kernel-Note9.zip ), reboot back to TWRP
17. Flushed respectful Magisk-v20.4.zip, then flushed Disable_Dm-Verity_ForceEncrypt_11.02.2020.zip, reboot back to TWRP
18. Flushed Magisk-v20.4.zip one more time.
19. Reboot to system.
20. Installed NetHunterStore.apk
21. Installed NetHunter terminal through NetHunterStore
22. Installed NetHunter app through NetHunterStore
23. Entered NetHunter app, finiished chroot setup
24. Entered NetHunter terminal, go to ~ to fill the power of root, do some apt-get update stuff.
25. Enabled Magisk hide option and renamed magisk manager within Magisk settings.
26. Reboot to system. Magisk fails to run with "This app keeps crashing".
27. Installed Magisk manager 8.0.3 from SD.
28. Disabled and re-enabled Magisk hide and renamed magisk manager within Magisk settings.
29. Reboot to system
30. Installed Magisk module "MagiskHide Props config" ?
31. Entered NetHunter terminal (AndroidSu for now)
32. Run "props"
33. Choose pt. 2 to force basic auth, end up with SM-A300FU device fingerprint.
Steps 30 to 33 may be simplified to Open "ROM Tool" app, -> Mods & Fix -> SafetyNet fix -> Apply. End up with SM-N770F device fingerprint. That really seem to be better, than one set with "props". Thank's to
@dr.ketan for mention that.
34. Reboot to system
35. Add card to GPay, pay contactless, do record some calls, collect some wi-fi handshakes.