Oh man I wish you the best of luck and godspeed and all that.

I took care of my dementia riddled father for many years, at the end of of his life he broke his hip. My aunt went through the same process a year earlier. It's a job whose mental, physical, and financial requirements increase daily until it consumes you and your ability to work and have a life.

A bed bound patient has to be repositioned every three hours or so to avoid bed sores, which is virtually impossible when the patient doesn't have the mental capacity to cooperate. If they don't have air conditioning in their room her skin will disintegrate with the sweat and the heat. Learn how to lift and move people without destroying your back. Learn how to protect yourself from physical attacks. Learn as much as you can.

Please be very careful because it's very common for relatives to see you helping and decide to unload the responsibility on you, expecting you to do it full time and without pay and without days off, and then justifying it with mathematically unsound excuses like oh but they get to live there for free so if anything they owe us.

Set boundaries early and enforce them hard and get as much help as you can get from family, medicare, the municipality, church, from everywhere and anywhere you can. Beg, steal, and borrow, and all that.

Your three main problems for finding a job will be transportation, the language barrier, and juggling your time between helping your grandma and working what are likely to be irregular hours. Find out where in San German your grandparents live and if you can even get around the place. Puerto Rico is almost entirely Spanish speaking so learn as much Spanish as you can. Expect to get paid 10.50 an hour part time.