Or what are other ways I can access this equity to purchase?  

Anyone can buy a stable senior income fund like FLBL with the click of a mouse and no liquidity or complexity issues. 

They offer a demo too, so you can see if it is exactly what you are looking for:)Just a small note to keep in mind as you are starting out, making connections and looking for deals, keep in mind how you are presenting yourself. 

Quote from @Tatum Littleton: Take a look at this BP beginners guide.

I will explore the refi avenue to access the equity.

@Jay Chung If the mechanicals for the duplex are in the basement it may be better not to give the tenants access.

Start with BiggerPockets Ultimate Beginners Guide (free).

I made some in depth STR marketing videos on youtube (I come from a hotel marketing background) before I joined BiggerPockets and people loved them.

For others that don't do this day to day, it may not be so basic.We use FINDIGS.

What tips do you have for someone just getting started?