If you are a senior citizen, I would bet that the small size of a sub notebook's monitor/screen would drive you nuts. My mother has a small notebook (Sony Vaio) and it is so small it drive me nuts. Maybe you'd want to get an iMac or a Mac Mini with a big monitor.
Daughter has a Sony Vaio full sized lap top and it's not too bad on my eyes but the price is a bit much right now.
The last thing I want to do is make a mistake.
You've been a big help, much appreciated.