New Member! I own one, what to do next?!

[Kevin Dokyi]

Hi everybody, I'm Kevin, 27, from Italy and I live in Miami. I bought my first rental property in 2018 in Miami Beach, a condo apartment, and it's now paid for. I never really been into the mechanichs of Real Estate even if I did buy one apartment and now after 5 years, I'm interested in investing in more. I'm reading Brandon Turner's books and I'm getting some informations about REI. I now don't know what option would work better for me. I could either get a HELOC and get another LTR or get multiple cheaper options instead of one. I bought the apartment for 140k and it's now worth 260k. I'm also thinking about selling it and use that money for many downpayments but I'm very confused about what I should do next. While I'm still studying and preparing myself, what would be your advise? Thank you, Kevin!