Unfortunately professionally qualified trade jobs are nearly always filled by poorly trained and paid Asians. You will find it extremely difficult to find something in your field. Also, if you are not married, you will need a sponsor. Women can only sponsor their spouses on a family visa for certain salaries and job positions. Living with someone you are not married to is considered adultery and is a crime here. Do people do it? Yes, but there are serious consequences if you get caught or more likely, someone gets angry with you and decides to dob you in.
There are a couple of independent businesses where professional trades people are offering their services but I can't be more specific as my experience here has solely been with my landlord provided repairmen.