A huge hidden part of this career is data management. You will shoot 100GB of footage per week. You need a system for cataloging B-roll, creating "macro" templates, and exporting in H.264 for fast uploads.
Traditional editors focus on continuity. UPD editors focus on retention. This means:
Go to a local coffee shop or gym. Record a 60-second Loom video of yourself critiquing their social media.
The client starts asking for "just one more revision" or "can you also post this?"