Coolant leak troubleshooting, 2011 VRS, Petrol

So like one week of ownership, thought my biggest problems was getting music sorted and some power for road trip. Seems like I was wrong.

Went on a short trip today. Engine temp light came on. 5 mins back home and see leak in driveway. Coolant up to the pipe in the reservoir. Can't see a leak, can see a fresh splash on the under tray maybe slightly right of centre.

Look at coolant diagram, there's so many points of failure. Any advice for troubleshooting appreciated. Keeping in mind that most work on car that is mechanical is out of my comfort zone? Do I top up with water and take to a garage?

Making this sound. (If helpful)

Ive got like 2 weeks until I'm meant to be on a road trip.