I presume you are talking about the one day fielding restrictions? If so yes it can be hard, thats why you have to take a risk. I would use Eddie's edited stroke files, these help slightly. Also take guard on or just outside leg stump so you can free your arms more for legside shots. When you time the ball perfectly, your confidence will build up, meaning it is easier to find the gaps, then hitting more runs and big shots will become easier.