First of all thank you very much for offering your help and for giving Penpot a chance. These are very intense days for the team and it is very comforting to know that there are users willing to collaborate with the project.
UX/UI contributions
Honestly, we are assessing what is the best way to handle this. It’s a challenge. We want to facilitate as much as possible your contributions and rise to the challenge of the work of our community. Soon we will communicate more on the subject.
At the moment the best ways to support Penpot are bug hunting, translations and creating libraries & templates. So we will improve the tool while helping other users.
Participate in early Layout (autolayout) testing
We are working on the Penpot Layout feature and the progress is very promising. We would be willing to have a group of users who want to test the functionality and give feedback when the time comes.
If you are interested in participating please write to us at support@penpot.app subject [LAYOUT TESTING] . We will contact you back when the user test group is ready 
