Gues you are so lucky to have a sloping garden - this isn't something that we can help you with unless you join GoY as we need to know aspect, soil... lots and lots of info. What type of plants you like...

To make it easier, how about terracing it.?

How steep is it - just a gentle slope or something that requires a rope and pitons? Sun or shade? Windy, exposed, warm and sheltered?

Perhaps you understand now why you need to join us Guest