Tegan, I was catapulted into early retirement in my 50s. It is a shock to the system but the thing to do is to look ahead and list all the things you have wanted to do but haven't had time to do and then find out how to do them so that when you do retire you hit the deck running.
I have always been overactive, over 15 years into retirement my days are packed solid. I have activities I follow at home and those I go out to do and, occasionally days when I am so tired I just collapse on the settee.
I have just returned home from a long weekend, 2 days with DS and family in Yorkshire, coming home via DD in Hertfordshire. In that time I have coped with an excited 3 year old's birthday, including party at a local museum with 13 other 3 year olds, and family party that involved impromptu kickabout in the garden, involving adults and children with 3 year old's new football and planning decoration of DGD's bedroom, to be done in 3 week's time. Coming south I had a leisurely day with DD that involved a long swim in the local lido. Today I am having a quieter day, sat in front of screen editing a magazine. It is amazing how the hours get filled.