Research, research, research.

Learn about all the major cryptocurrencies (BTC, ETH, XRP, DASH...)
Learn what makes them different, why they are useful and why they were so widely accepted.
Learn the different aspects that make a successful coin/token,
whitepaper, team, background, niche, overall feel, market opportunity.
Read until your eyes bleed from so much goodness!!

I think the only thing that sets an expert apart from a newbie is knowledge and experience.

READ AND DO

Success will follow.