Trying to split and create a partition. Could use some advice.

Trying to have both Windows 10 and macOS on the same ssd on my Asus Zenbook notebook.

Running into a few issues trying to follow this guide..

Step 2 says to right click the C drive and resize it. It does not give me that option. The only drives I can resize are the Recovery and SYSTEM drives.

Screenshots of MiniTool Partition

How do I progress?

Any advice? Recommendations on other guides?

Windows 10

Intel i7 8565u 1.8GHz

Intel integrated graphics

16Gb RAM