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LearnOpenGL
Code repository of all OpenGL chapters from the book and its accompanying website https://learnopengl.com
If you have a good math background and are a reasonably experienced programmer (or whenever you get there), I do highly recommend jumping into OpenGL. LearnOpenGL is the standard resource for this (it's fantastic), and you can get some basic graphics off the ground in a couple days. This is the most powerful approach to take as it will allow you to program for hardware acceleration, and also takes care of all the rasterization/clipping algorithms required to perform fast rasterized graphics. With OpenGL and GLFW you can do stuff like write a whole game from complete scratch (again, starting from nothing but a compiler and a blank text file), which is a great exercise in pretty much every aspect of programming ability.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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Use https://github.com/ocornut/imgui to add a GUI.
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Use https://www.glfw.org/ to get a window with an OpenGL context.