Its a pretty good career, I have been at it for 3 years. There are many jobs besides advisors, but they have potential to make all the money. the series 7 is really hard, but its more memorizing laws and what types of investments there are instead of math.
The trick to being an advisor is the selling. You have to develope leads to build your client book, which can take a few years, After that you can just charge a % of your clients accounts to manage