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I want to write a guide for the game "Steven Universe: Attack the Light", but how can I write the guide?

Where is this option?

Hi! I am a beginner in the world of SpeedRun and would like to try this game as my first official attempt.

Could you recommend a good program for transmitting my cell phone screen to a computer for recording and a SpeedRun stopwatch?

PS: I made this text with the help of Google Translate.