Despite the glamour and hype you have seen about the modeling profession, it's hard work. It's boring (sometimes) and it can be tedious. Prepared to be constantly rejected, get ready for some major ups and downs. Modelling is a lifestyle, not an 9-5 job. Not all jobs pay well. Unless you are seriously committed about modeling, willing to work at it on your own time, live a healthy life style, etc., you will not succeed as a model.
You have to understand that there are lots of other people who want to be models, it's a very competitive business. Are you willing to put the time and energy into competing with pretty much everyone you meet, 24 hrs a day?