Learning how to read music definitely takes time. There are no tricks to mastering the skill in just one day or seven days. What successful music reading comes down to is how much time you set aside to practice developing your music reading skills.
A key thing is to start practicing at the proper level that you can understand easily. It is important in learning how to read music to build a good base of knowledge and continually reviewing your skills.
If there is an easy instrument to accompany your music reading, you should choose the piano just because it really helps when it comes to learning to read music. It somewhat gives you a visual of what you are doing.
Following these simple ideas would help you be successful in your goal on learning how to read music. Again, the key things are to practice at your appropriate level and dedicate plenty of time to practicing.