So, Blondie (What I called my Avatar) sets off on her raft for another island and not far from the shore that she left behind she fall off the raft into the water and can't get back onto the raft. So, she swims back to the shore before she drowns and decides to build a jetty can only one wooden floor on the ground and not any on the water.

(Question One), Is it possible at all to get back onto your raft after stepping off of it into the water?

(Question Two), How do you successfully build a jetty?