I am a graduate of mechanical engineering and I want to blend my career towards aviation and aeronautics and how do I do that??

Find a job at an Aerospace company. I know, easier said than done. But Aero and Mech are very similar! I graduated with Mech Eng and work for Boeing. I manager 12 engineers, with a cross section of MechEng, Aero, Electrical degrees. Anything an aero can do, you can to! Don't let the title of your degree prevent you from finding the career path in aerospace.