To become a model , you need an agent and or a modeling agency.
this is how it works, in almost every city of the world, there are modeling agencies. you set up an interview with modeling agencies, and they speak to you about the process.
To sign with an agency, you need lots of good modeling photography pictures, and sometimes agencies sign you with a photographer, sometimes models just do pictures with their own photographer. BE CAREFUL! usually 70% of modeling agencies spam you, meaning they convince you to sign with them, they take money from you, do a couple of pictures and NEVER CALL YOU AGAIN. This is what modeling agencies do, after they have your pictures, companies that need models for commercials or runway or things like that contact the agencies, and the agencies sends pictures of their clients… but they dont ALWAYS send your pictures, as a matter of fact sometimes they dont send ur pictures at all. so thats how people get spamed, they pay and then never get contacted again… because like i said, you can be a model in a commercial, or a model in an ad.. I was personally discovered by modeling agencies, and what they said to me is, I dont have to pay a fee, i just have to pay $700 to do my pictures and Im done, While I took my sweet time to think about it, my fashion friend paid for herself and did pictures.. contracts usually last about 6 months.. she never got called back after she gave money and did the photoshoots.
SO THIS IS WHAT YOU DO.
Google search Modeling Agency with your city’s name… call them, set up an interview etc etc. (take my advice about spamers, pick the best agency).. if you find a good agency, they will hook you up with shows etc.

IF THEY ASK FOR A FEE, DONT PAY.
IF THEY SET U UP WITH A PHOTOGRAPHER AND YOU JUST HAVE TO PAY FOR THE PICTURES, ITS FINE BUT BE CAREFULL BECAUSE SOME ARE SPAMERS.
ALWAYS PICK THE BEST AGENCY YOU CAN FIND
hope that helped