message: doc: Expand section on Getting Started
diff: @@ -17,9 +17,27 @@ release cycle, overall merging, moderation and appointment of maintainers.
  Getting Started
  ---------------
  +New contributors are very welcome and needed.
  +
  +Reviewing and testing is the most effective way you can contribute as a new
  +contributor, and it also will teach you much more about the code and process
  +than opening PRs. Please refer to the section [peer review](#peer-review) later
  +in this document.
  +
  +Before you start contributing, familiarize yourself with the Bitcoin Core build
  +system and tests. Refer to the documentation in the repository on how to build
  +Bitcoin Core and how to run the unit and functional tests.
  +
  +There are many open issues of varying difficulty waiting to be fixed.
  If you're looking for somewhere to start contributing, check out the
  [good first issue](https://github.com/bitcoin/bitcoin/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22)
  -list or participate in a weekly [Bitcoin Core PR Review Club](https://bitcoincore.reviews/) meeting.
  +list or changes that are
  +[up for grabs](https://github.com/bitcoin/bitcoin/issues?utf8=%E2%9C%93&q=label%3A%22Up+for+grabs%22).
  +Some of them might no longer be applicable. So if you are interested, but
  +unsure, you might want to leave a comment on the issue first.
  +
  +You may also participate in the weekly
  +[Bitcoin Core PR Review Club](https://bitcoincore.reviews/) meeting.
  Communication Channels
  ----------------------
  