it just takes practice, keep at it and you should get it eventually. also what would really help is having a concrete goal for what you want to do in your dream. if your only goal is to become lucid, you'll find it harder to achieve much dream control. pick a dream goal and really work toward it. think about it often, daydream about it even when you can, this is called incubating. the more you want to achieve the goal and the more interest you put in that particular goal it will make you remember to do it when you become lucid next. also i notice since your just starting out you lucid dreams are quite short. dont worry about this, the more you lucid dream the longer they will become. good luck