Well, if youre in Minnesota then you already can know who your senators are. There are only two senators for statewide, and they are Al Franken and Amy Klobuchar. Try
http://www.klobuchar.senate.gov/ or
http://www.franken.senate.gov/ to see them. They are both democrats. They list contact numbers though, so its easy to call and ask them to say, support S604. Do that once or twice a week and find a few other people to help you in MN, and they might start caving.
If you want to find your US Representative for your district, normally you can type in your zipcode and maybe address to find it. The same goes for state senate and state rep. Just google or goodsearch "Minnesota us representative/state representative/state senate" and it should point out an appropriate website.
State reps are especially easier to influence, due to more local nature. You often get personal responses from them. The more persistent you are, the more likely you will get a response from any representative.
If you want a job from one of these people, you can typically apply for an intership. If you are lucky one of them is paid some amount of money. For example, I know Ron Paul's internship program has a mix of paid and unpaid jobs. What degree you have might help (i am assuming you have one if you said you had loans). With politics, you have to work your way up from a low level like that slowly.
You could also check out other organizations. The ACLU might be a good one. There is also this
http://www.cfboard.state.mn.us/campfin/pcfatoz.html to find a PAC.
For just local activism, try canvassing for local/state legislative candidates in your area in your free time. Or phone banking. Write an editorial to local papers that you can write in spare time at home. That gets readers who are normal people, not an echo chamber like here.
I've heard Minnesotan Ron Paul Republicans are doing great at influencing the GOP there. They have become an active force in the politics, and took over many local Republican organizations. Just type in your county and Republican in google search- you may be surprised what you find. Also, the Independence Party is pretty influential in Minnesota. They have some good things going.