If you want to learn the basics, go to one stretch of beach at low tide, study it, and learn that well. Do it as many times as you need to until you learn that area. It would help if it was near an inlet, you can then learn what happens near the inlet as the tide ebbs and floods. Look for eddies or pools of different water near the sides of the inlets. Concentrate on one thing at a time. Your confidence will build up that way.