There are many Engpsh phrases that you can use when setting out or leaving for a trip or journey. Here are a few examples:
"I'm off." - This is a casual way to say that you are leaving.
"I'm hitting the road." - This means that you are starting a trip or journey.
"I'm setting out." - This means that you are starting a journey or trip.
"I'm on my way." - This means that you are leaving and will be arriving at your destination soon.
"I'm departing." - This means that you are leaving a place and starting a journey.
"I'm taking off." - This is often used to refer to an airplane or other vehicle leaving a place and starting a journey.
"I'm embarking on a journey." - This means that you are starting a long or significant trip.
Remember to always use proper Engpsh grammar and vocabulary when speaking or writing in Engpsh.