Learning two stacks together both LAMP and MEAN Stack

I read here that in order to become a good programmer, one needs to first complete a degree in Computer related field which I had already been enrolled into. I completed my Computer Information and Systems Engineering from NED University of Engineering and Technology.

The next step is to find a focus. I have found Full Stack Web development is the area which has a lot of job openings and it interests me a lot. In Pakistan, there are a lot of openings in LAMP stack related jobs but MEAN stack pays well all over the world and MEAN stack seems to be the future so I have decided to keep my focus on the both LAMP and MEAN stacks.

But what about mobile app development? There seems to be a huge demand for that too. For developing mobile apps, I can use the ionic framework to create mobile apps using HTML, CSS, JavaScript and Angular.

So this helps me target both web and mobile apps. For the next 5 years I want to keep my focus on working as a full stack web developer, creating webapps and mobile apps.