Singing with the throat only

Hi, I feel like I'm relying mostly on my throat instead of body support to sing as my throat feels tired and sore after practice and I lose body support very quickly into the song. Any course that I should follow that may address this issue?

Please see below for some suggested courses. Thank you!

https://www.30daysinger.com/tutorial/avoiding-bad-vocal-technique/1

https://www.30daysinger.com/tutorial/removing-vocal-strain/1

https://www.30daysinger.com/tutorial/breath-control-like-a-pro/1

https://www.30daysinger.com/tutorial/practice-better-breathing/1

https://www.30daysinger.com/tutorial/finding-your-breath/1