Hi hi.. Carlos.. How old is he at the moment? Just keep doing what you love and do your best at it. My sister earns quite well on writing. She has her own website link here
She graduated as a chemical engineer but loves to write more than becoming an engineer. You can start with your own website, choose a niche, monetize it using google adsense. Do for the next couple of years. =) She started doing this maybe around 5 years ago. Now earning well every month. Start somewhere.

It's quite sad to hear about your grandfather.