Busting into the world of jingles is not like regular music. First you need to decide what your target market will be. Then the leg work starts. I am not sure getting an agent would help, but if you do, one who has ”legs” in the industry can’t hurt. Ad music business is what they call R&R business; relationship and reputation (so any agent better have a great reputation). There are publications out there like the ”Artist Market” series that has contact and submission requirements, they have them for cartoonist, graphic artist, authors, so I suspect they might have one that covers artist seeking to sell jingles, either as part of the aforementioned books or standalone. Once you have a particular prospect in mind, if you do not know how to submit work, ask them, sending it unsolicited, even with a great cover letter, it may never get heard. Once you find out how, attach your cover letter to your demo, and be sure to mention you contacted them before, even better if you mention whom you spoke with. Use the best method you can if you cannot have it recorded at a professional studio. In San Fran there was a place, One Pass Video where you could rent time to utilize professional quality equipment for recording and video editing. You just needed to know how to do it or bring your talent that did. They had techs you could hire but they were not as cheap. If you recorded your jingle on your cell phone etc., you may never get them to hear another you submit. After you sent it in, and sufficient time has passed, follow up but don’t nag. Certainly wait past any time they say wait, if they say it may take 60 days to hear back, wait the 60 days, don’t call or email them back after two weeks peppering them with question as to if they heard it or what they thought of it. One thing you can do is take a piece of paper and try to think of anyone who is close or connected to the industry, or if not that, who is close to other people in the industry and see if you can get a little help slipping past some of the gatekeepers. Good luck, and if you get a gig remember by consultant’s fee ~~~ LOL LOL