I recommend you read the following thread: Why use ShotCut versus other video editors?
Many long-time user have weighed in and this should be more than enough to get a basic idea.
If you just search for a free option that adds a lot more options than Shotcut can provide, you could consider DaVinci Resolve. But it is not intuitive at all and I unistalled it quite quickly, since I realised that I do not need all of the options.
And if you really put effort into the learning Shotcut you can add a lot of options. As explained in the thread linked above, there are for example the GL transitions and the powerful WebVfx framework, which enables you to use HTML and CSS for effects. You will find tutorials and use cases by various users, especially helpful are the ones created by @jonray.
@KKnBB added some interesting pointers. Even though, mastering Shotcut in such a short time frame is rather improbable. If you have prior experience, you will be able to master the basics in this time frame. (If you meant that, KKnBB, I agree with your assessment 
.)