During a natural disaster, you could jump back and forth carrying aid in, and the wounded people out. In any time sensitive crisis, you could get people out of harms way. This bit is more complicated, but you could potentially help out during floods and fires, depending on how far the ‘teleport other stuff with you’ extends to.
A reasonable limit might be ‘Only what you could physically carry yourself’, in which case you’d need to be a lot more strategic. In that case, you could work on personal strength and be a one-human-rescue-team. When there isn’t a disaster, you could probably shuttle light weight (but important) stuff for a fee, then use that money to fund your own charity to do good
As for this prompt, you could probably just teleport away when someone might see you, or teleport to spots that people can’t see. So you could do most things that invisibility would allow