I want to become an agent

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For many years, I've wanted to become an agent, but I've never really had the opportunity to follow through with that desire. Originally, I started trying to get a license in California because I lived there, but the class I was in for Principles and Practices ended up being the worst possible class ever because the teacher was completely useless (he literally spent 99% of the time talking about how great it was to be a broker and how he's a broker in 3 states and how most of us would fail at being a real estate professional). So, I went back to focusing on my career as a nanny, which I've done for 11 years. This last summer, the family for whom I worked moved from CT to upstate New York. After 7 months of not being able to secure anything long term that has enough hours (I've gotten a few babysitting gigs here and there, and I work very part time as an assistant at a telecom brokerage agency), I've decided to pursue real estate again. 

I looked online for classes but all of the places I can find that aren't associated with brokerages cost an arm and a leg and don't have any openings within the next few months. I did, however, find some brokerages that offer the necessary training for licenses if you work for them. 

So my questions are:

1. Is it worth being trained by a brokerage or is that a situation I should avoid at all costs?

2. If it is worth being trained by a brokerage, how do I write my cover letter and resume in such a way as to make me look like a useful candidate without lying?