There's no single "best" way to do this; the most rewarding path is to start with a small, manageable goal—like updating your favorite team's kit. From there, you'll naturally learn the ropes and discover the tools you enjoy using the most.
Android/data/org.ppsspp.ppsspp/files/PSP/TEXTURES/ (Note: On newer Android versions, you may need a specialized file manager to access the Android/data folder). Windows: Documents\PPSSPP\PSP\TEXTURES\ Step 3: Move the Texture Folder
. Today, the modding community has breathed new life into this title through high-definition texture packs that make the game look nearly modern on emulators like Why Upgrade Your Textures?