20 yr old new investor with duplex.. What is next step?

[Charles Burkholder]

Hello everyone. I am Charles Burkholder from Ontario Canada. I am a new, eager 20 yr old investor and I was inspired to pursue real estate after speaking with Larry Conner, owner of The Connor Group, a $1.3 billion dollar real estate investment firm. I get the Bigger Pockets emails sent direct to my phone and read them in my spare time. I also download and listen to the BP podcasts whenever I get a chance. In February of this year, I bought my first duplex for $147K with 20% down. The numbers are great and I was able to get excellent tenants in it. I haven't been to the property in months. I am wondering what all your experts advice would be for me to do next. I don't have enough personal cash to purchase another rental property and I want to pursue and build my portfolio into a full time and high-value business. What would you advise my next step to be? Thanks.