Look, look, & look
get down to a child's level and look around.
.. every electrical outlet, furniture corner, hanging cord, unsecured furniture, stairs, steps, tile floors, cabinets, chemicals, medicines... etc. etc. etc. all need to be secured, covered, gated off.
Ask others to help you look for hazards in the home. There are even companies that specialize in protecting the home for a child (depending on city)