回复：申请美国公民要等多久?申请过程是不是麻烦?需要

Not at all if you follow the instruction for N-400. You still have to wait for another 9 months before you are eligible for submitting the application unless you're married to citizen. You can start to prepare materials, though. Usually it takes a year so or maybe even less. Check the BCIS website to look for your local office waiting time.