Practiced Singing Light and Shadow

Hello, need advice on how to belt more properly and have a more clear voice for head voice. Honestly, I'm self taught and don't know proper techniques but would like to improve more on certain aspects. Also i do not know how to mix so the quality may sound not as well but I love to sing. There may be some parts that are delayed and i do not know how to fix that on bandlab. Been singing since i was little. The link is on bandlab. https://www.bandlab.com/post/a1b4aa49-29e4-ef11-88f6-6045bd3473c0