For example, I'm learning 3d modeling and such, but there's a TON of different aspects to it... from storyboarding, to modeling, animation, lighting, etc etc etc. Lots of different sub-branches, and some I like (animation and modeling are fun), some are kinda alright but nothing special (lighting, texturing), and some flat out suck (storyboarding, UV'ing and rigging suck baaaaaaad).
Same goes for any career path; there will be some parts that suck, and some parts that are enjoyable. Different branches, will have different values of each they go into, but likely shall touch a little bit on each in the process.
So being a 'politician', is kind of vague... whot do yeu want to be a politician OF? Governor? Maybe in charge of fisheries? A senate member devoted to tax law reform? There's literally hundreds of jobs that count as 'politician', all under a big blanketed umbrella that's all encompassing. Yeu will dabble in a bit of each, but yeu may have a particular area yeu're strong in and appreciate more.
Find out which parts yeu enjoy the most, and which ones yeu hate the most, then figure out which job/career path will lend yeu the most yeu enjoy and the least yeu hate, (there'll always be some of each) and aim towards that goal =3