Identify small tasks for external contributors first patch
from the CII badge app, it is a recommended practice to encourage and enable new contributors:
"The project MUST clearly identify small tasks that can be performed by new or casual contributors. (URL required) [small_tasks]
This identification is typically done by marking selected issues in an issue tracker with one or more tags the project uses for the purpose, e.g., up-for-grabs, first-timers-only, "Small fix", microtask, or IdealFirstBug. These new tasks need not involve adding functionality; they can be improving documentation, adding test cases, or anything else that aids the project and helps the contributor understand more about the project."
UPDATE: Also make sure the new contributions are submitted properly, e.g. implement DCO.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information