It's just an easy thing to keep, and as this is your first herp, isn't that what you want?
A bearded dragon is a very different creature from a mbuna cichlid.
Bearded dragons are undemanding, easy to keep, and good lifelong pets.
Beardies are solitary but they grow large. They are usually well-behaved but some people have had nasty ones.
If you don't have much free time I'm afraid your earlier claim is indeed false: sorry i think i could look after any pet successfully with enough research
As a lot of species require a lot of time. The bearded dragon is an exception to this and is a fun pet to keep.
One leopard gecko.