apache php variable url rewrite?

[marco]

loads of tutorials out there, I know. All do not make sense.
and keep failing.

The result I'dd would like to have is, from this url:

www.link.ext/?page=login&login=true
to
www.link.ext/page=login/login=true/
or something simmilair

I know I need htaccess for that, I just lack the ability to write the right content in it even after following tutorials.

So I'dd like to ask you to,
A: give me a source sample, that does this, which would be nice
B: give me a link to a tutorial that actually helps and is pretty understandable. You may consider the tutorial on kidslevel.

Also, something that just came to my mind. I remember wordpress having their own error page redirect. How can I redirect to a page on notfound error?
lets say www.link.ext/page=test/ does not exist
I want the error not found page to be
www.link.ext/page=notfound/
how can I do that?

anyways thanks for reading, hope you can answer these questions.