That is cool. A little late though. Very few people are interested in investing into the old platform. Unless you have some particular use case which would make it viable. For cheap gaming PC a520 motherboard, Ryzen 5600 and 32gb ddr4 3200Mhz+ is the option. Otherwise you will get decent "cheap" ASRock A620/b650m motherboard, 7500f CPU and 32gb ddr5 6000mhz cl30 ram. The price difference for this 2 setup is about +-$€100. I was only building PCs using AM4 platform to get rid of my old parts I had or to get better money for my old GPU when selling together inside the PC. For someone building a very budget oriented PC it may make sense though.