Need fundamentals of combinational and sequential logic, followed by perhaps a course on hardware/software interfacing to grok timing parameters like setup and hold time, propagation delay, fan in, fan out.
FPGAs can be developed using CAE-like systems or SystemVerilog, VHDL, or something modern like Veryl. Real FPGAs include acceleration blocks like DRAM, SRAM, CAM, shifters, ALU elements, and/or ARM cores.
At the end of the day though, the best teacher is to learn by doing and finding venues to ask questions.
FPGAs can be developed using CAE-like systems or SystemVerilog, VHDL, or something modern like Veryl. Real FPGAs include acceleration blocks like DRAM, SRAM, CAM, shifters, ALU elements, and/or ARM cores.
At the end of the day though, the best teacher is to learn by doing and finding venues to ask questions.