This is your job, and it really shouldn't feel difficult. This is really not tedious: the minimum board design for these chips literally consists of just power, JTAG pins, and a clock (if the internal oscillator isn't good enough.)

The Gowin FPGAs are available (at a massive premium) from Mouser, just like whatever MCU you are already using. Many are available for <$1-2 in China. Efinix are available from DigiKey, with some SKUs under <$10.

All of the Gowin documentation is available on their site with a free, approval-less email login and no NDA, or via Google directly (PDFs, just like Xilinx, even numbered similarly.)