Gardener Job in Edmonton, Alberta

Moved into our house last year just before winter. Spring is here now and we are looking at starting fresh with a new garden. Initially looking to clean up yard and establish two new flower beds. Revive two existing beds. Would like to plant a couple trees in front and down side of house for privacy. Yard is small so not major work. We want something low maintenance that we do not need to re plant after every winter. We are new to Canada so don’t really know what plants do well in this climate and which don’t.