Even if you look at large corporations, they focus on one thing until they get established. As that point, they may branch out into other areas, but they still do not lose sight of their main thing. Chick-fil-A is known for their chicken sandwiches. Before they made a name for themselves, Apple only made Macs. When they first started, Levi Strauss manufactured work pants. Find your focus and become an expert before you attempt to branch out.