Should I download RAM on my computer?

If you mean Random Access Memory, it's impossible.

Explanation:

You cannot download a RAM because it is a Hardware (It is a physical part of the Computer) and at such can not be downloaded like softwares (The Instruction part of the Computer).

Well, if you want to, make sure it's safe.

I don't know what RAM really is, but check if it's safe first. And maybe talk it out with your parents.

That's all I gotta say!