@TiagoSeattle , please have a look at the guidelines in this thread on how to make a good cut-out, especially the parts about cuts being in 250x only if images are of the sufficient quality and the fact that there should be no more than 2-3 pixels beneath the chin in every cut.

I suggest using remove.bg to get an initial draft cut.

Here's a few tutorial videos to help you out.

How best to use remove.bg:
https://streamable.com/tgfkx1

How to shift collars upwards:
https://streamable.com/yvx80y

Rotating sources:
https://streamable.com/k3tbjz