This phrase is not about literal feet or water but about trying something new.

Metaphorical Use

It's used when someone is starting something but isn't diving in completely yet.

Initial Experience

Generally implies a good opportunity to learn something without full commitment.

Indicates someone is familiarizing themselves with something before fully starting.

Emphasizes a slow or gentle start to a project or job to build confidence.

Points out that the person is in an initial learning and observation phase.