At the risk of repeating things that others may have brought up...
These are things that you should not pick up until you have 4-6 weeks behind you: a gallon of milk; a laundry basket; children (any age); cats and dogs; anything heavier than a standard dinner plate in the sink; things out of the bottom cupboards; laundry from the washing machine (wet or dry); cast iron cookery or frying pans; pots of water, such as for boiling potatoes;, a leash attached to any dog larger than a chihuahua; a bag of groceries, especially with bottles or cans, bags of potatoes or onions; a standard container of laundry detergent, water softener salt, dog food, or cat litter.
These are things you can get very hurt doing: opening or closing car doors or heavy house doors; using a trowel or shovel in the garden; pulling weeds; weedwhacking; using a hammer, wrench, or screwdriver; scrubbing pots or broiler pans; washing a whole sinkful of regular dishes; washing windows; scrubbing countertops; cleaning bathroom surfaces; using a manual can opener; sweeping or washing the floor; pulling on boots; getting yourself off of the floor or a couch; getting out of a bed or recliner; hanging up jackets or heavy clothes.
These are things you can hurt others by doing before 4-6 weeks: drive a car (you can't turn around to see things quickly and you can't apply full pressure to turning the wheel in an emergency - and if you don't have consent to drive from your surgeon, you may find that your insurance doesn't even cover you if you have an accident); hold a child or even baby in your lap (you won't be able to hold them if they start to slip off - and some of the toddlers tend to throw their heads back into your chest); watch a toddler in any but the safest of places (you can't chase them fast enough or grab and hold them reliably enough).
There's lots more, but this gives you some ideas. The worst things are the things you don't think about when you're doing them.
Best wishes,