Any tips on agencies that better fit a sales agent just starting out? 

We switch to dual pane and made a world of difference.

I don't think they offer that...maybe through an agency with another carrier?

Wherever you took your broker's class you should have ample study materials.If you are talking about your real estate agent's license in NJ (that is not a broker's license), you need to take the initial class at an accredited agency and they will give you all of the materials after you finish the 75 hours for the test. 

I obtained the umbrella policy through their "agency" which finds other carriers for their members.

That being said, and this is not for a sourcing homes for sale, but to source accredited investors in my line of work, the average marketing agency is looking at about $30-50/accredited investor lead setting up a call. 

Or perhaps a trustworthy agency that will help me sell it.

Taxpayers to the rescue.So Congress passed, and President Bush signed (wow, kinda forgot about Bush until now), the Housing and Economic Recovery Act of 2008 (HERA), which established a new agency (we love creating new federal agencies in this country): the Federal Housing Finance Agency, giving it authority to place regulated entities into conservatorship or receivership.

In my day job I do SEO for a digital marketing agency and I am more than happy to talk SEO with anyone who has questions.I'm interested in Long-term rentals, though admittedly, finding deals below market value and funding those deals (not to mention I honestly have no idea have to put the deals under contract in the first place), are problem the first things I'll need to learn.

Costs a fraction of the funds compared to hiring a cold call agency.