Hi! I'm Aliza, a BC patient and also a Medical Librarian (retired). I still however do research and referrals for people here on this site and elsewhere. My late mother also had a melanoma on her hand that they caught early and removed-no other therapy necessary! She died years later from a Cerebral Hemorrhage. My late father had CLL and died from that in 2009 after 6 years of that, but prior to that he had basal cell carcinoma on his legs and had been having MOHS surgery so I can understand your concerns re skin cancer and I myself have a full body check at my dermatologist once a year. I have an age spot on my hand that I keep an eye on as well.
If you use the available search engines - Bing, Google, Google Chrome, and search how to check for melanoma, you'll find reasonable guides for doing exactly that, but I checked around and came up with something a little out of the ordinary which might appeal to you and that's an app which you can use with your smartphone to help you figure out if a particular mole is a melanoma, The URL for it is: http://www.melapp.net/
I hope you find it helpful. I'm curious to know what others who've had the disease themselves will have to say. I see my dermatologist for a few other conditions several times a year so I don't just go for a screening.
Wishing you well,