The term “MLM company” isn’t exactly accurate because the company is not necessarily defined by the fact that it uses a multi-level marketing structure. Instead, a good MLM will be a product-centric company, meaning that it will be, for example, a cosmetics company that uses an MLM structure. Test the product of the company you are interested in; the product must be something that you would willingly advertise even if you weren't working for the company.
Don’t give up, and don’t throw money into areas where you don’t have to. There’s no such thing as completely free marketing leads – you are always risking something, whether it is your brand, or your future earning potential. However, with good networking, passion, and the right people, you can achieve success. Talk to some mentors and more experienced marketers today, and see what they have to say for you. You may be surprised at how much you can bring in, with the right choices when you are getting started.