There are so many genres you can access with your guitarlele. You do not have to just play classical guitar music. You can play a lot of genres.
Just revisit some easy tunes with C F G chords to get going on the chords. Then follow a similar learning route to what you did on the ukulele, but with six strings. Revisit the tunes you know and learn the rest of the chords on six strings.
To access the guitar music, make a simple transposing table by writing the chromatic C scale on one line and the Chromatic G scale underneath it. The guitarlele notes and chords will be on the C line and the transposed guitar notes and chords will be on the G line. Or vice versa. You can use this simple table to find the chord shapes in a guitar chord book, and navigate using guitar material.
Once you get to a point where you feel comfortable with the two extra strings, you have a lot of choice in directions you can take.
Classical, Jazz, Country, Blues, Chet Atkins/Tommy Emanuel and Co, George Young and Co, Angus Young and Co, Slim Dusty, Kieth Urban, Stuie French, Nick Cave, Daniel Johns, John Butler, Alex Lahey and many many more. A way to navigate the maze of opportunities is to pick a guitar hero name and follow them for a while, listening, looking up the TAB and videos, learning about how they play.
Also there are actually magazines you can probably easily find at your library or newsagent like "Australian Guitar". They have a teaching section for several genres and information about guitars in Australia. Plus a lot of glossy stuff.