Contributing via kernel-janitors

I'm unclear as to how via kernel-janitors, I can support patches to the
kernel. Are bug/documentation anomalies already identified in some
archive, or are we expected to choose a subsystem, search for such
anomalies as described in the KernelJanitor/Todo page, acknowledge our
willingness to make fixes and submit patches to
kernel-janitors at vgerkernel.org? What kernel subsystems are current being
reviewed and patched by kernel-janitors?

I'm certainly willing to lend my support to this work; hwever, I could
use some guidance.