Welcome to the Forums. Yes, the first time with a DSLR can be a bit daunting. However, we have access to some amazing resources on this site. A good plave to start would be the review of the K-S2 which you will find here:
Pentax K-S2 Review - Introduction | PentaxForums.com Reviews
To get there (without the link), go to the menu at the top of this page, where it says "Forums, Cameras, Lenses, Accessories, etc ..." and click on "Cameras". From the drop down menu, select "Pentax K-mount DSLRs" and then go down to the K-S2, click on that and then click on the "In-depth Staff Review". In that you will find some recommended settings as well as a lot of other good info that will more than get you started.
Sorry if this is a bit detailed, but I like to be sure that someone is not left wondering how to get somewhere. There is so much info on the Forums.
Enjoy your retirement
Peter