Used when someone begins to be involved in a new, especially challenging situation. He waded into the task of sorting out the company's finances.
Pro Tip 2/3
Potential Conflict
Often implies stepping into an ongoing debate or controversy where there may be conflict. She waded into the debate fully aware of the possible backlash.
Pro Tip 3/3
Figurative Use
While it can mean physical entry, in this context it's about engagement in non-physical activities. Despite the risks, the mayor waded into the reform efforts.