Hello,
You are right in your comments.
What we aesthetic physicians and surgeons do is definitely rewarding and gratifying for both the patient and the doctor.
However, there are too many physicians performing it in Singapore now, thus, it may not be wise for you to want to dabble in this field at such a late timing.
If you really would like to have a go at it, please refer to my colleague's answers at the top on how to do it in Singapore.