Hey Kalyan

Bachelors of Architecture doesn't involve only Drawing/Scenery making skills, to be good at architectural work you need to have a good Geometrical skills, that is the capability to make accurate and precise geometric figures. You need to have a good knowledge of making figures with scales and other tools. For example, making shapes and their 3-D shapes. Also practicing the figure making will make you better and soon you would be able to have good drawing skills as well.