First week on fake skin

hi! Im a beginner tattoo artist completey self taught as of now, im looking for an apprenticeship in my future but for now im just practicing, heres my progression so far! please ignore the horrible smudges on the final two i switched fake skin and the new one is straight garbagggeeee, thats after i scrubbed it with a bristle brush and soap too😅 but any tips or things to look out for?