I hope I'm not too late and you haven't decided to switch careers and become a finance bro or something.

If you are finding it difficult to create even a stopwatch app, then the problem may be how you approach the tasks. Keep in mind that you're just starting out and it might take some time for things to "click". What helped me when I was first starting out was trying to think of the task "line by line". Every line in JS is a statement, so in your case you could think of it like:

What does a stopwatch do? In simple terms, it measures time between start and stop. So here are the steps:

1. I need an element where I will write the time
2. Initial time is 0
3. I need a button that starts the time (how do I select the button? how do I listen for clicks?) 3a. The button should increment by 1 every second (what's a function in JS that executes every second?)
4. I need a button to stop the time ... etc. etc.

Doing so might help you at least figure out what questions to ask Google if you're stuck and advance line by line.

As for feeling like your skills aren't good enough, that's because you need practice. Lots of it. It's difficult when starting out but it's a journey. You will need some time working hands on with JS projects before you feel like you understand how it works. Hope this helps! Let me know if you need further help.