Making your own firmware without any knowlegde of coding is impossible, also u need a donor card, which means u need a dma donor card version of the card u have rn. Éven if u manage to make your own firmware, u will probably not make one that works for the anticheats, and u will recieve instant bans. i would recommend using shibs firmwares, big seller, big name, fair prices and fast delivery i can link his discord below shibadev_dev