• Download your Emulator of choice (MuMu 12 is suggested https://www.mumuplayer.com/ )
• Download a File Explorer - MiX explorer is a suggestion (https://mixplorer.com/#intro)
• Enable Root in the options of your emulator and restart
• Download the game in the Emulator
• Run through the game and complete the tutorial
• Once you have finished the tutorial, go to settings and enter the code TRICKCAL2026 for an additional 20 rolls
• Do your rolls on chosen banner of choice
• If you like your rolls then go to settings and bind your account to an email immediately
• If you don't like your rolls then open your file explorer, navigate to /data/data/com.bilibili.trickcal and delete the shared_prefs folder found there
• The above step will completely delete the account found in that emulator and give you a new guest account to reroll

BONUS:
If your PC is strong enough to handle multiple instances of MuMu at once then you can set up multi-instances and synchronize all of them using MuMu's Synchronizer to reroll several accounts at once. Simply download the game on a "Master Instance", clone the master instance, delete the sharedprefs folder on all the clone instances you plan to reroll on and synchronize them using MuMu's Synchronizer so that MuMu repeats actions and movements taken in one instance across all others at the same time.

NOTE:
Trickcal doesn't have a problem with root but a lot of other games hate it when your device is rooted so you might want to disable root once you're done rerolling if you plan to use the emulator for other games