Now you can check the skills of each unit from the sdgn wiki here in English. Just click the link on the left of your screen.
In the sdgn wiki, you can also find out the side quests/challenges of each missions.
Note that the accuracy of translation is not 100% accurate. If any mistakes or question, you can comment down below this post or that specific wiki page.
Hope that help.
- Create a translation and guides of in-game interface.