Journeyman
Try as many as you like. Your streak and XP follow you across all of them.
Rank
Greenhorn
XP
0
Streak
80 XP to Apprentice
Shared by every trade
Shared by every trade. Nothing here is wasted whichever way you go.
Power, circuits and code
Heating, cooling and airflow
Supply, drainage and fixtures
Heat, metal and precision
Layout, cuts and framing
Panels, inverters and rooftops
This is practice rather than certification.