Don't be a Lawyer unless you want to spend the next 4 years of your life fighting asians that are being threatened by their parents with death if they don't succeed. The money that you can get from it are also not very good unless you're pretty much Jesus Christ or some other messiah
Teacher is excellent job security and employment options, decent wage for a 4 year course result, plus the wages go up pretty decently yearly. Depending on your desire for it, you could earn upwards of $100k as a Principal/something higher.
To be a registered psychologist you have to do a 4 year undergrad course that includes an Honours year, then 2 years of accredited employment or study which usually determines what kind of Psychologist you're going to be; Clinical, Occupational, Neurological. Depending on what uni you go to, the postgrad degree can include 4000+ hours of compulsory work experience as well as a research thesis.
If you don't feel up to the competition, I'd go for the teaching degree. Most secure field in terms of employment.