How can you be a continuous learning expert?

1. Continuous thinking
2. Reading about the specialization
3. education courses

Setting annual development plans is quite important for being a learner

You must consider the consequence before you do or say anything. This helps you create a thinking platform. 

Oh and watch out for online courses or anything. Education is the best way to enhance your skills.

Moreover, take on advice only that feels right to you, avoid literally becoming an advice puppet. Some people really take them up so seriously without acknowledging whether it fulfils their gap. 

Keep yourself motivated and focused by treating yourself or people you care about.

the best way is through CPD (Continuous Program Development).  You can acquire it by joining a certain chartered group of such specialization you are looking.  You can also acquire it through e-learning but of course it is all about yourself on how you will act for it to become an expert.