How can i switch from CV to C++-related field?

I am a prospective graduate student with a research focus on computer vision. Although my undergraduate major was unrelated to computer science, I have spent significant time self-studying computer-related subjects, including CS50, C/C++, Python (basic familiarity), data structures, OS, computer organization, and networks. I found that I am seriously interested in C++, especially for Linux dev and game dev(for future job). To be honest, I do not plan to pursue a career in CV, but I need the graduate degree. So i will(must) study content about CV.

My questions are: How should I plan my studies to prepare for these career goals? Is it feasible to transition from CV to a C++-centric field? Or which content about cv should I spend more time since they are linuxdev/gamedev-related?

btw, I am trying to run the project: Full-head Gaussian Avatar with Textural Editing from Monocular Video according to my supervisor's requirements. Idk which exactly subfield i will study in future, but this project name may help classify it.