Broaden your options
If you don't know if your decision will be right, especially if there seem to be only few options, try to find more options. How? First: Find the goal behind the goal. You think your goal is to have a career and the decision would be to invest really all of your time into your job? Then what's the reason for it? What is it you want to reach (it can't be that you really just want more work)? Do you want to prove your dad that you can make it high up in business? Do you reach for independecy, do you want to have the responsibility for what you do most of your lifetime?
When you found out what really is triggering you, you will see that there might pop up options and possible was to this goal (or to cope with this reason) that didn't make it to your mind yet. Once the fixation to a "one and only way" is gone you might find out that there are alternate realities in which your goal behind the goal can be reached as well and much more easier, or faster.
The other way to broaden your choices is just to wait a little more and in this time, to communicate with as much people as possible about your wishes and where you want to go. Just give it a shot, i won't tell you what happens, but be assured: If there is no unpassable deadline and you are unsure, there is nothing working better for you than a certain time in wich you talk about what you want.