Contributing: add "Finding tasks and issues to work on" subsection

It is a common question from newcomers how to find tasks and issues to
work on.

Add a new section to the "Contributing" document that tries to answer
this in general, including linking to our "good first issue" and to our
'Other tasks and "good first issues"' list and suggesting to reviewing
code and subscribing to the mailing list.

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

Author: ojeda

src/Contributing.md

@@ -30,7 +30,7 @@ The Rust support is part of the Linux kernel, and thus contributing works the sa
 
 To learn more about the kernel development process, please read the documentation under [`Documentation/process`](https://docs.kernel.org/process/). In particular, please make sure to read [`submitting-patches.rst`](https://docs.kernel.org/process/submitting-patches.html).
 
-In addition, it may be a good idea to contribute a small cleanup or fix somewhere in the kernel (not necessarily to Rust code), in order to get accustomed to the patch-based workflow. From time to time we add ["good first issues"](https://github.com/Rust-for-Linux/linux/contribute) to our GitHub issue tracker for that purpose.
+In addition, it may be a good idea to contribute a small cleanup or fix somewhere in the kernel (not necessarily to Rust code), in order to get accustomed to the patch-based workflow. Please see the section below on "Finding tasks or issues to work on".
 
 ## Ways to contribute
 
@@ -48,6 +48,14 @@ There are many ways to contribute to the Rust support in the kernel:
 
   - Helping others on Zulip. For instance, getting them started with the Rust support in the kernel.
 
+### Finding tasks and issues to work on
+
+From time to time we add ["good first issues"](https://github.com/Rust-for-Linux/linux/contribute) to our GitHub issue tracker which are good to get started with Rust kernel development.
+
+In addition, we also have a list of [other tasks "good first issues"](https://github.com/Rust-for-Linux/linux/issues/1058) from our users (e.g. drivers) and other projects.
+
+Finally, reviewing code and subscribing to the mailing list in general are very good ways to identify code you could improve one way or another.
+
 ## Getting started with Rust kernel development
 
 Please read the documentation under [`Documentation/rust`](https://docs.kernel.org/rust/). In particular, the [Quick Start guide](https://docs.kernel.org/rust/quick-start.html).