Start with digital logic fundamentals(not, or, and, xor, xnor gates, flip-flops(d, jk, etc). It helps to know some analog theory so you understand propagation

Start with digital logic fundamentals(not, or, and, xor, xnor gates, flip-flops(d, jk, etc). It helps to know some analog theory so you understand propagation delay and such. Then you'll probably want to learn a language like Verilog or VHDL. From my experience, most people like Verilog and VHDL is mostly used in the defense industry. You could probably skip right to Verilog/VHDL, but I really suggest having a background in digital logic. FWIW, I'm just an embedded software guy. I came from an EE background but it's been a long time since I've played with programmable logic.