Newbie with Duplex looking for advice to scale

[Monte Rice]

Hi BP family, i am a newbie in RE and have acquired a Duplex using FHA. I am now looking to scale and get more rentals (preferably multi family) but I am open to SFR for use on Airbnb. What is the best way to scale? I wanted to refi out of my FHA loan from my duplex to go conventional but I don't know lenders will work with me even though I live in one of the units so its owner occupied as my primary residence. Any advice on what I should do next to scale? Also looking for any mentors or PLs that may be open to working with me.

Thanks in advance!