Campaigns are described as messaging. From the inside they are logistics, arithmetic, and an unglamorous amount of paperwork. Filing deadlines. Signature thresholds. Reporting schedules. Rules written decades ago by people solving a problem you may no longer have.
What that teaches you is how much of public life runs on process that nobody currently alive designed. Some of it protects people well. Some of it exists because removing it was never anyone's job. From outside, both look the same. You only learn which is which by having to comply with it.
It also teaches you what door-knocking teaches everyone who does it: most people are not following the argument you think you're in. They want to know whether the thing in front of their house is going to get fixed, and whether the person asking for their vote will still be reachable afterwards. That is a more demanding standard than any policy debate, and a better one.