I'm a strong swimmer and attend two masters classes a week but I've never swum in the open water before. I've gone and entered the Edinburgh open water swimming festival with the aim of doing the 2km swim from Musselburgh to portobello. I've booked the wet suit so I have all the gear. Reality is sinking in though... Should I aim for one of the shorter races that day 800m or 400m or just go for it. I'm terrified I land up having to be rescued, coming last or making a fool of myself. I am a strong swimmer so 2000m is not a problem in the pool but open water might be a different matter. Any advice?