Understanding what a Letter of Intent is and when to use them is a bit confusing. But basically, this letter just means you are serious about continuing towards a purchase and that you want the other party to stop entertaining other offers. Our Letter of Intent template is suitable for all states.
Without job-level specifics, it can be tempting to get stuck in an "I'm awesome" loop without giving enough specifics. If you have a general idea of what job groove you'd be seeking at this particular company, build your letter body around that. If you're truly just trying to get a foot in the door at a company, you can use clues from your research about the company. What does their website say about their mission and priorities? What do current and past employees say about the company in online chatter? Even without specifics, you can cobble together a pretty good idea of what the company is seeking in potential employees. Sell your skills and experience points that are special to you, and especially relevant to your industry.