what are good VHDL learning resources for a newbie? thinking about using a lattice ECP5 in a design. primarily interested in using a risc V core to load files

what are good VHDL learning resources for a newbie? thinking about using a lattice ECP5 in a design. primarily interested in using a risc V core to load files from an sd card and then do all realtime processing as programmable logic rather than on the risc V.