To gather more Bitcoin knowledge and digital currencies overall, you must be updated with some research, more study, read articles, connect with bitcointalk forum etc.
Also If you would like to become a Bitcoin and Blockchain expert, follow these steps:

# Read a book on Bitcoin, remember study is everything
# Invest in Bitcoin
# Attend large Bitcoin meetup or conference.
# Write blogs or articles and share them with experts.

Hava a nice day.