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Look at CircuitMaker [1]. It's a simplified free version of Altium and will be more accessible than KiCAD (not to bash that, KiCAD is crazy good nowadays). Maybe start with one of the existing public designs and modify it.

I have an MSEE. The only reason I learned the board design process in school is because my office mate convinced the department to let him teach the class completely out of his own generosity (he still had to TA like normal). The class was well attended, universally loved, and only ever offered once (the guy understabaly thought it was too much effort to do it again). It was a huge benefit to my career.

Board design is so accessible these days. Circuit design and debugging boards is still a steep learning curve.

[1] https://www.altium.com/circuitmaker