Pick the core and focus on the core.
Choose what makes the most sense to you and what you must do. Once you've chosen what's most important to you, do it the way you do best.
Choosing everything means choosing nothing. The reason world-renowned masters were able to become the best masters is that they chose and focused on what was most important to them. Success requires being best at one thing rather than halfway at several things.
Do not try too hard to make up for your weaknesses, but use your strengths to develop your core competencies. Choosing and focusing means throwing away what you shouldn't do. If you choose the best, you should be able to give up the rest boldly. In order to make the best choice, greed is prohibited. Because you have to give up a lot to choose the best core.
I wish you success in the core that matters most to you.