If your not already used to cleats, rather stick with the sneakers until your comfortable - there is a lot to get comfortable with when riding on the road i.e cars, traffic lights, group riding, pedestrians, rim brakes(?), wet roads. These can require sudden stopping and its generally safer to not also have to remember to uncleat - plus you can easily walk in sneakers I did the 200km DC with someone who rode in sneakers, no issues. I'd say give it a month or two, then look at some cleats once you've settled. Personally I love the road - speed, group riding, lots of fun . Good luck with your new adventure!