These were some studies I did of various subject matters, sticking to just using a few values and keeping my mind on editing and making interesting shapes to let the image read clearer. Sometimes even subtracting certain elements to help with a composition you want to get across.
Here are the links to the reference I used:
https://www.pinterest.com.au/pin/740912576193086115/
https://www.pinterest.com.au/pin/AQS1DCesqAkPb8NiXUgZ5G1yvKIKSvyR9dGym9U70XdniFKYR1EoLAM/
https://www.pinterest.com.au/pin/740912576196927390/
https://quickposes.com/en