Well Feinstein's not up until 2018 (if she runs again, I guess), so you have time. But really trying to run for Senate is a multi-year process. You ultimately have to convince hundreds or thousands of people to volunteer for you, and round up millions (if not tens of millions) in cash. Especially in California - it's literally a tenth the size of the country population-wise, so you're basically running a race that's a tenth the size of a Presidential campaign. In the Primary alone you're going to need 600K or so votes at least.
To do those things (recruit volunteers, bring in donations, get attention) you need to start in advance by networking, building contacts and gathering favors. You should get involved now in the local House race or a county/statehouse race to start that process or at least to get familiar with the political process or how people commonly run campaigns. A lot of people sort of subscribe to the notion that politics is or should be simple, but the reality is that you have to know what you're doing to be effective. Charisma and ideas only get you so far.
To do those things (recruit volunteers, bring in donations, get attention) you need to start in advance by networking, building contacts and gathering favors. You should get involved now in the local House race or a county/statehouse race to start that process or at least to get familiar with the political process or how people commonly run campaigns. A lot of people sort of subscribe to the notion that politics is or should be simple, but the reality is that you have to know what you're doing to be effective. Charisma and ideas only get you so far.