BAMS

For admission into BAMS courses under general category your score shouldn't be less than 300. However, this may go up or down as BAMS admission is happening through NEET for first time.

Naturopathic physicians identify the causes of illnesses and use the body's natural ability to heal it holistically. They use herbs, exercise, meditation, massage, hydrotherapy, and nutrition to bring about wellness and balance.
You need to obtain a Bachelor's degree which includes prerequisite courses in chemistry, biochemistry, anatomy, physiology, cellular biology and all labs associated with these courses.

It is a subject taught in BAMS. It is the important basic clinical subject of Ayurveda. Kayachikitsa is the foremost branch of Astanga Ayurveda.

First of all you need to clear your 10+2 with physics, chemistry and biology with minimum 50 percent mark single and aggregate, then you need to qualify in the entrance exam such as NEET or institute level entrance examination and secure the merit required as per the institute's requirement.

It's difficult to get admission in government medical colleges at this score. For government medical colleges, your score should be 400+.
All the best.

Dermatology is a specialisation which you can get only after MBBS.
You cannot get it after any alternate medicine degree.
But extensive remedies are available in Homeopathy for skin issues.

I would say you should give it a try. There is a big chance for you to be selected. Apply in multiple colleges and wait till the last cutoff list.
All the best.