Pain was something we were expected to endure. But I doubt very much if you would be entirely happy today if a doctor threw a towel in your face and jumped on you with a knife. ↗
Look at our Lords disciples. One denied Him; one doubted Him; one betrayed Him. If our Lord couldn't have perfection, how are you going to have it in city government? ↗
You will encounter many distractions and many temptations to put your goal aside: The security of a job, a wife who wants kids, whatever. But if you hang in there, always following your vision, I have no doubt you will succeed. ↗