Surgery residency is grueling. You have to be the type of person who can function and maintain a stable mood without a lot of sleep, at least for a few years of your life! Medical school can also be pretty grueling as far as hours. There is a lot of memorization and also nights of call with little sleep. That said, you do not have to be a genius, just a hard worker. It's important to keep in mind that it is just a period of time and the medical school and residency experience is not what the rest of your life as a physician will be like.
4 years of college (on average) for a Bachelor’s degree - Usually in biology, chemistry, or biochemistry, but I also had med school classmates who majored in art, psychology, history, music, etc. It’s really just a matter of making sure you take the correct prerequisite courses. Your pre-med advisor in college will help you with this. You will need good grades, lots of volunteer experiences (any volunteer work counts, but especially related to healthcare), and it will help if you shadow a few different specialties during this time, because medical schools like well-rounded applicants. You will also need to do well on the MCAT exam.
4 years of medical school (on average) - Some people will take extra time to do research or get a PhD.
After medical school, there are two main ways that people become plastic surgeons:
1. Apply directly to plastic surgery residency - Most programs are 6 years long, but some have extra research years as well. This is one of the most competitive specialties in medicine, and it’s very hard to get into these programs, so you will have to do VERY well in medical school to match into one.
2. Some students choose to go into general surgery originally (which is a 5 year program) and then decide later to apply for a fellowship in plastic surgery (usually 3 years). General surgery is not quite as competitive as plastic surgery residency, but you still need to be a very good candidate with excellent grades in medical school to get into general surgery residency. You also have to maintain a good status during your surgery residency if you want to apply for plastics fellowship, because your acceptance will depend on your performance during your residency.
I hope that helps!