If you want root access, flash the Magisk zip after the ROM.
Since this is a "cracked" port, you might encounter some "broken" features: Sometimes unstable on MediaTek ports.
Tell me your (e.g., Global, India, China).
Ensure you are on the correct firmware version required by the ROM developer to avoid boot loops. How to Install (General Steps)
You may need to use Magisk modules to pass SafetyNet for banking apps to work. Conclusion
Flashing a new OS will wipe every single file on your internal storage.
Most stable ports are based on OnePlus 7 or 8 series builds.