Everyone in Congress came from somewhere. It's possible that they were once in local or state government or active in major social causes, but that's not a safe assumption. The problems and procedures faced in the Capitol are uniquely complicated, and I'm not sure how much practice you'd get in the seven weeks between election and inauguration.
What training (if any) does Congress provide to newly elected legislators on rules, procedures, or relevant skills? If there are no formal programs, how does the new blood get up to speed while still fulfilling their duties?