light · gentle · relaxed · effortless · uncomplicated · to relax · to take things less seriously

After saying everything that I had to, I felt relaxed.

Our task has been easy so far, but it will be difficult from now on.

I felt quite relieved after I had said all I wanted to say.

This implies a fun and relaxed working atmosphere where team achievement is highly valued, communication is extremely important and traditional 3-hour meetings have been replaced by informal chats in the queue for coffee.

I feel relieved.