I spent the first 7 years of retirement as a nanny for various families--was in three different states and made a lot of friends along the way.
Once I got back home, I got involved in the quilt guild, volunteering at the hospital, and church activities and LOTS of Quilting.
It is good to have some things you make yourself get ready and go do (exercise class, bridge club, senior center activities, travel with family or friend(s). etc.) Make lunch/dinner dates with friends, mostly just be sure you get out of the house several times a week! Happy Retirement--enjoy it.
This summer I have "sister-sat" so her daughter could go on vacation. I live in KS, she is in Indiana, as is most of my family so that is a bonus for me. In Oct, I will take my brother to New Mexico for a month to visit his sons, again, this gives his daughter a break from her care-giving responsibilities. He can't drive anymore, and he really enjoys getting to "go home", which is what NM is for him.
I bet you can find more things to do than you will have time for--then you get to pick and choose. :-)