Garden higher than house
Have just bought a house and the garden is much higher than the house. There is a (bulging) 8 foot high restraining wall which when built probably held the garden 6 foot away from the kitchen window but is now less than 4 foot back at some places. Overgrown stone flags lead you straight up to the top of the restraining wall; then a zigzag path back and forth across the garden leads you up to the (overgrown) lawn at garden level.
There is no fencing and significant drops and I have a (accident-prone) 5 year old child. What to do? Is digging it all up and moving it back an option bearing in mind there is no access to the site except through the house and very little money in the bank.
Could I just put up some fences for now? If so: what should I be checking the tradesman is doing to make sure they are safe?