laptop questions

I recently purchased a Legion 5 Pro laptop and am very smitten with it. I want to do everything I can to look after it and ensure that it lasts a long time.

Since I'm new to all of this, I have a few questions about it.

Should I invest in some form of screen protector? I'd like it to remain scratch-free.

Should I acquire a keyboard so that I don't have to use the laptop's keyboard as much?

What should I do with the laptop in order to keep it safe? Delete stuff, for example.

Thank you, and please let me know if you have any questions!!