Anything you do the first time you won't know if you can do it, but you decide to give it a try. You may not have an easy time the first time, you have to learn as you go.
Now you may find that you don't like it at all and decide you don't want to do that again. But since you tried it you know for sure that it isn't something that you want to do.
It may also be something that you like to do and realize you are good at it. You would have never known if you hadn't tried.
The only way to know is to try it so you will know. You may assume you know or guess but you won't truly know until you try it.
It may be hard but you have to put the work into it if you want to truly give it a try. Just like you knew when you were young that learning how to ride a bike wouldn't be easy but you knew that you wanted to learn so you kept trying.
Keep in mind that even some kids learn how to ride a bike but decide they didn't like it so they never ride a bike again. But then they can proudly say they know how to ride a bike but they just choose not to.
Many adults try out careers then decide that they just don't like it and go on to another career. That doesn't mean that they weren't good at it. It simply means that they tried it but they didn't like it.
They don't have regrets for learning it because they thought they would like it but they didn't. You only regret things that you never tried that you wish you would have.
To live life with no regrets make sure you try it so you won't have regrets that you didn't try it.