This is how your journey starts, by dipping your toe in, if unsure why not book on an introduction to open water swimming course, it covers using a wetsuit, acclimatising, top tips whilst swimming, using tow floats, other swimming aids, swim drills. Taking the time to relax, float and enjoy your surroundings, there are no swimming police. Yes good technique helps propel you through the water, leads to a more efficient stroke, but that can come later. Give yourself permission to be in the moment, love life. If your a confidence swimmer but haven't experienced open water, what are you waiting for, one dip and you will be hooked. Look on other websites, facebook pages, join a club, go with someone experienced, be safe, keep swimming.