The most effective phone calls take less than a minute: say your name, your city or ZIP code, and what you support/oppose, maybe a sentence on why. You’ll be marked down on a spread sheet that is discussed at the daily office strategy meeting.
Other actions like brief emails, meeting in-person at the district office, meeting in-person at the DC office, can also be effective, but take more time and energy. Emails aren’t always read right away like a phone call must be answered for example. And you generally need to make an appointment for an in-person meeting.
How many calls cancel out each dollar from corporate lobbying
Less than you would think, but it also depends on how you contact them. A physical call is way more powerful than an email. 10 people passionate enough to call can easily translate to 1k people passionate enough to vote about it.
It’s highly variable, and yes I absolutely agree money in politics is a big problem. I do have a direct experience where reaching out to my Senators led to them aggressively and successfully opposing a provision in a law that would have had a big impact on me. Don’t want to dox myself, but this real change to a bill made a huge difference to me and many others. So it is possible to make an impact.