First, get a job. You need to be employed now and making money. Getting hired anywhere can take from a few months to over a year. The chance of getting a LE job on any level, especially the federal in less than six months without prior experience is slim to none, with none getting hit by a bus.
Second, you need to figure out what you want to do. You want to work financial crime? Just kick in doors all day? Work on immigration issues? Do you like contract fraud? How much travel do you want to do? Do you want to work drugs and undercover work? Etc... YOU need to sit down and decide what you want to do, and then find an agency with that mission/investigations.
Third, every job, especially in law enforcement has paperwork, and lots of it. Some title have more, some have less, but there is a lot of paperwork. I do more paperwork and writing as a fed than my days in the NYPD or FHP. I know my counterpart 1811's do the same in the OIG world...memorandums of activity, memorandums for the file, case notes, reports of investigation, progress reports, criminal complaints, search warrants, arrest warrants, affidavits, interoffice correspondence, etc... There are security based/physical protection based positions and then there are investigative positions. Security based/physical will have less writing than investigative where you tend to have to document the majority of things you do.
Finally, I think you underestimate you competition. LE is not a job you say you want and just go get. You have to be selected. A bachelors degree is not that competitive in the federal work force. Everyone coming in now has a bachelors, and CJ, PS and PA are a dime a dozen. Many are CPA's, have masters, JD's and even doctorates. Most federal investigations (not all), involves financial crime or computer crime. You have an associates or minor in that? You speak any second languages? As a guy who sits on the office hiring panel, why should I hire you over the ten other people applying? Don't tell me what a great a guy you are...I want to know what you have done to prepare yourself for this work and what you can bring to the table.
-In God we trust. All others, put your hands on the car and don't move.