Improvements for homepage

The following was raised by @comradekingu
That particular passage doesn't intrinsically say anything about why it is possible to help Jamulus.
It would be possible anyway, so the user is left wondering what the link between helping and the unknown concept is.

People don't know what the GPL is, and even if they did, there are three versions of that license.
There is also "Play music online. With friends. For free." which makes a bigger point out of it being gratis, which undersells freedom.
The landing side is not a place where the decisions made command any sort of authority.
Invocation of "us" for no reason.
Mac should be "macOS". (like it is in the side-menu)
Erroneous use of an ampersand (&).
Triple self-referencing (and then som), with redundant info in the ingress, not line-shifted at that.
and brings → bringing
Wall of text inducing stress.
Exclamation points after two consecutive sentences for no good reason.
Duplicated button making the website more likely to scroll vertically.
"ASIO is a trademark and software of Steinberg Media Technologies GmbH " should be in a mouse-over.

How about reducing the workload to just the work being done and then look at it all once done to see if something can be improved upon?

_Originally posted by @comradekingu in https://github.com/jamulussoftware/jamulus/pull/2880#discussion_r990443819_

Start by reviewing the homepage content and the discussion referenced from pull request #2880. Group the requested wording, layout, terminology, and presentation changes before making any edits. Done means the listed homepage concerns have been addressed consistently and the revised landing page has been reviewed as a whole.

Written by the indexing model from the issue text.