“Is Pediatric Cardiologist a career?”
Yes, and we have dealt with a very good one (with very good results). One good thing about being a pediatric cardiologist: Most of your patients get better!
“At the moment, I know I need to go to pre-med college for four years, take an MCAT and get a bachelor’s degree and then apply to a four year medical college. Is this information correct?”
This is correct. You should be aware that to be any kind of doctor you are looking at 8 years (minimum) of university. Therefore you need to budget for 8 years of university. It is not uncommon for top expert specialist doctors to be paying off their student loans for a long time after graduation (>10 years) so you need to minimize the cost and minimize debt as much as possible. Also, the most important thing for admission to medical school are GPA and MCAT scores. Maximizing your undergrad GPA usually does NOT mean going to the most difficult and academically challenging university possible, but rather means going to a pretty good university where you can do well (noting that premed classes will still be very challenging). Also, there is no such thing as a “premed” major. To go to medical school most students major in something that is sort of vaguely related to medicine, biology or pharmacy would be reasonable options but are not necessary. Given the large number of students who start off planning to go to medical school but never get there, it might be a sensible idea to consider an undergraduate major that you are interested in and that can be somewhat helpful towards a possible alternative career.
As such, for most students who want to go on to medical school the first place to look is probably your in-state public flagship university (except for large states the top 2 or 3 state public schools or if you live in California more like the top 10 UCs would be good). There are MANY very good universities in the US that have very good premed programs. For most students from the US, IMHO it would be crazy to go anywhere that is significantly more expensive than your in-state public university for your undergraduate education.