I am also a beginner in tattoos and have read a lot about tattoos recently. Regarding the first question, as long as there are no scars or lesions on the skin, this tattoo is fine. As for the recovery time of the tattoo, it depends on the technique of the tattoo artist. It usually takes a month to complete. Once the previous tattoo is restored, the next one can be started.
This is the information I found recently, please correct me if I am wrong.