There are two types of agencies, find out which one you've got the deal with. Also, go on Models.com and find the biggest agencies in your country. You can google "model agency [your country]" and send your info to the listed agencies. Check the portfolio and news feed of the agencies Review the portfolios of models represented by the agency. Look at how often these models are getting booked for j*bs - frequent work is a green flag. Be cautious if an agency promotes just one model while many others on their roster seem inactive or underutilized.
1. Mother agency - basically this will be your manager. They will schedule everything, provide catwalk courses, take polaroids, and promote you. Eventually, they will sign you up with a regular modeling agency that will give you work contracts with big-name brands. A mother agency usually takes 10%-20% of your revenue. You can start with them and gradually build up your career.
2. Modeling agency (usually located in fashion capitals aka Milan, Paris, New York, London) - They provide j*bs: ad shoots, fashion shows, etc., often during fashion weeks. They usually take 20 - 50% of your revenue per j*b contract with a big name. You can go straight to them, but they might require you to move to their country for j*b offers.
Important Notes:
If an agency ever asks you to pay for shoots, it's likely a scam. A good way to check if an agency is legit is by checking their listing on Models.com. However, even if they are listed, be cautious, as agencies can pay to be listed there.
READ EVERY WORD on your contract before signing. If possible, have a lawyer or your parents review it (sharing your contract with an outsiders can violate confidentiality clauses). Fines and penalties are common in modeling contracts, and they are not necessarily a scam.
6'4" at 14 is insane, you will grow a couple inches more, so you probably won't get to earn money later. 6'3 is usually the limit for height in modeling (fashion shows). Your height might be a dealbreaker. Some male models exceed this height, though it can limit certain opportunities. Height limits can vary by market and agency.
If a contract lasts only one year, it might indicate that the agency is not fully committed to you. Typically, a 2-3 year contract shows more commitment and gives you enough time to build your career.