[kgtm]

If you are on the fence on professional proofreading due to cost, I think that a thorough review by a native English speaker (maybe a good friend) that is at least somewhat technical would be enough to correct a lot of the issues.

I find the way you write enjoyable, free-flowing and absolutely understandable, but there are quite a few instances of expressing things in an subtly unnatural way, which detracts from the otherwise great experience. Perhaps this isn't the best example (and some things are subjective too), but to illustrate what I'm saying:

> You’ll even know how to show your CPU usage and memory via the status line.

I would rewrite that to:

> You’ll even find out how to show your CPU usage and memory via the status line.

Or even better:

> I'll even show you how to display CPU and memory usage right at your status line.