Also new member. I have been reading this forum for some time. I have been on lots of jobs with steel toed boots and never ashed to leave. I have known some electricians that thought that the steel in the toe would ground them. I think that is just superstition. No reason that steel would conduct better than all that water your standing in ( the ditch or flooded basement.
As far a foot wear I would check with the old guys and see what they wear. Allways try to fit in. If the people training you like a certain type of tool, use it. Remember as the new apprintice, you job is to conform. Even if you see something that appears dumb do not point it out. Try to say around until you build time and gain experience. Lots of luck and work safe.