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Why is my tone so bad especially when I go higher (audio recording)


As an FYI I can also sing up to an F#5 and much higher in falsetto. But I just included the true range I would be able to use in a song.

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Tone stems from proper support and the techniques Ken teaches. By using a lot of air, you are relying on pushing the sound out instead of creating an amphitheater of sound in your mouth. This is also how you retain good vocal longevity because you not using as much effort in your vocals to create the big sound.
Just a hint, he covers all this in his 2.0 course but his free youtube videos are incredibly insightful
Danny