How do I reset a forgotten firmware password on my MacBook air?

Hi,

I am thinking about using an extra layer of protection for my MacBook Air, setting a firmware password.

However, If I forget it, I have no way of resetting it myself without going to an Apple store.

My question is, is there a way to reset a firmware password without having to take my computer to an Apple store?

I have also done a lot of research, and the best I could come up with was a youtube video showing how you can use an un-locker tool on a USB stick to reset the password, but it’s not free and I can’t afford to buy that kind of tool.

Is their a free and easy way to reset the firmware password on a MacBook Air, 2017?

I haven’t set the password up yet, I wanted to ask you guys if their was a way for me to reset the password if I forget it before I aplied that extra measure of protection.

Thanks in Advance.