lost engineer

im in my early 20s, electronics engineering graduate working in a company as a technician, work using tools like wrenches and stuffs, i regret now that i didnt excel in my 4 year graduation course, idk coding, i have only some technical knowledge but somehow graduated. i really wanna get back on it(design job), is it too late for me or i can still get it done? will self-study work, if so, what is the path?? help me put guys :((