I am with Dave on this ^

It does make a difference to security as most folks use a simple word etc. BTW, if any site of yours got compromised and your password was spotted to be "Labrador 8" or some such, you can guess that they would try Labrador 9, 10, 11 etc on that and other sites where you might operate!

Having used LastPass for a few years now I am a happy customer. You are not too old to learn, but learning how to do things efficiently is the most important lesson

For a few dollars a year it makes life very simple for me on a laptop, desktop, ipad and phone.

You can have it set up to change passwords automatically at intervals so that is one less think to have to worry about. You can set the standard "offered" password for new sites to be any combination of letters numbers and symbols, also adjust it for each site. It really is easy. You can, for example, set a standard 15 characters letter/number/symbol combination for each different site that you could never remember and when you are revisiting a site and logged in to LastPass it automatically populates the webpage and logs you in.

My white haired old head is very content with this as I now have a devilishly difficult different password for every site that I use now that no brute force cracking attack is going to get near anytime before I am pushing up daisies!