Leopard geckos are considered one step easier than bearded dragons because they do not need UVB lights, 40 gallon tanks, or green vegetables daily!
They have great personalities, but are a bit more fragile than a bearded dragon--being geckos, they have softer skin! A lot of people prefer beardies to leos, but leos are cheaper and great starter lizards!
Crested geckos are actually easier than leopard geckos, but they are often 70 dollars! You can find them cheaper rarely. The nice thing about them is you never have to feed them bugs, you can just feed them a special crested gecko diet(mix powder with water..makes them a yummy meal!) The only difference is they have pads on their feet so they can climb, and they need a humid enclosure(just get a thermometer that also has a hydrometer)