thinning out in both high and low

[richay]

so my problem is both in higher and lower registers. whenever i go into head voice, it gets really thin, as if its a product of vocal fry (and im pretty sure it is). I have been told in the past, they way to get started in head voice and stop falsetto is to use vocal fry, but i think its time to move on. i want a more thicker tone that aligns with my usual singing register. the same applies with my more lower range. how do i go about it, excersises, application, ect?

thank you in advance