I had meant to ask just what year it is too Rodger? Ours is a mid 2009 and I have upgraded it to High Sierra Os 10.13.6 That's an easy job too and it gives you the max in security.
I am a member of
https://www.mac-forums.com/forums/index.php and they are very good and really helpful on all things Mac.
On our mid 2010 MacBook Pro 13 I have upped the memory to the max at 8 gig, moved the 1Tb SSHD across to where the DVD/CD drive would normally sit and put a 250gig SSD in as the main internal disk. It needs some cleaning up after a while like that but it transformed the machine. Something like this one
http://uk.crucial.com/gbr/en/BDL250GBMX500SSDCONV
It make a hell of a difference and it ain't that expensive either.
Off out to our new place to do more floor sanding for the day. I'll look in later this eve.