Is it necessary to pay the desk fee under a broker?

[Young Kim]

Hi, 

I am about to take my RE agent's license test in few weeks, but I spoke to a broker who is willing to start working with me in advance. I was wondering if it is necessary to pay a desk fee and to utilize the desk or if it is even worth the money. He is asking for $300 a month until I get the first deal closed. He said it will be $200/mo. after the first deal, $100/mo. after the second deal, and that he won't charge me after the third deal is closed. He is also saying he will take 30% of the commission for my first deal, 20% for second deal, 10% for third deal, and 5% for the rest of my deals. Does this sound like a decent deal? 

Also, I was wondering if it is even normal for a broker to get me started when I didn't even take the test yet.

Please give me some advice. I really appreciate it!

Thank you very much in advance!