HI, thanks for using healthcare magic It is understandable that you concerned if your appearance is different from your school mates but it would be a very, very bad idea to do the steroids. They may have the temporary muscle building effects that you are looking for but would have more potential devastating effects on your liver, decreased sperm counts, atrophy of the testes, gynaecomastia (breast growth in men) and acne. In addition to the whey protein you need to increase the amount the calories you use daily if you want to gain weight. To do this you need to increase the portion sizes of your meals and increase the frequency of your meals.Use nuts or peanut butter or whole milk which are high in calories. Add dressings, whole fat mayonaisse, cheese, butter to your meals to increase their caloric value. You also need to remember that if you are doing alot of cardio exercises it is going to burn energy and stop you from gaining weight. You can consider strength training to build muscle but decrease your activity otherwise (the less energy you burn,the more weight you will gain). I hope this helps