Garden Nanny, that is a great name and you are going to do well because gardening is becoming a lost art. I spent the day today pulling weeds and it is genuinely satisfying. So you can only imagine how I felt last week when one of my landscapes won a garden contest.
Many people hate doing the work we do, very few people can even do it and people who can do it well are rare artists.
Two bits of advice for you; 1 study design, and charge your customers for design work. Start cheap and work your way up. 2 Do yoga 3. Charge twice what you think you can.
Welcome to the business and this forum, don't mind the restless natives (they are like the bugs in the garden, they buzz and bite, but they are not too bad).