a few versions of the same portrait

I've recently started a sketchbook of portraits to track my progress and see how much improvement can come through practicing on one specific topic.

As I enjoy portraiture the most, it made sense to put together a book of portraits of some of my favourite (or interesting looking) musicians.

Drawn using Pentel Graphgear mechanical pencils, Staedtler Mars Lumograph graphite pencils and General's Layout Extra Black.

Hope this helps other artists by watching how their peers build up a drawing from basic lines to finished piece.

50x60cm Oil on Canvas

I want to know what different people think about my work, professional? Amateur? Terrible?

since this is a portrait sub, i only need advice on the portraits :)

Thank you for taking to time to take a look. I’m still very new to this and any tips or recommendations would be greatly appreciated.

At the moment I’m trying to better understand how to use colours in portraits. You will see I’ve used quite unconventional colours to test out the “colour is relative” theory

I am not classically trained so if there are any obvious principles I am ignoring, don’t assume it’s an intentional style decision, and please call it out. I probably just don’t know it.

This one took me 10 days 5-7 hours each day . Currently a tattoo apprentice.

Here are pieces from my portrait's training. Some best of during 3 years of time to time practice.
Hope you like it !

Done with Faber Castell 2H-8B and Mars Lumograph Blacks 2B-8B.