Ok first of forget about all the geckos and most lizards. You want a animal that is able to live in a semiaquatic evoirement, and it aint many cheap lizards that fit the bill. For most such as basilisks and water dragons you would need a bigger tank because even if they like it moist they also need to stay dry most of the time (if not blisters is the next thing it will happen and its not pretty) and unless you are able to build a really large above tank tall habitat for them to climb and hide, it wont be a good idea. Its important to remenbar that there are very few true aquatic lizards, most like sailfin dragons, water dragons and basilisks only swim a bit every day, the rest of the day its spend basking in the sun and climbing braches, like normal lizards. Also keeping this guys with a big permanent water container aint practical because they tend to defecate in the water all of the time and I recomend to change it at least every other day if not daily. So a big powerfull filter its a must but even then they are very susceptible to some bacteria the filter medium has. The few species of lizard that I can see in your tank are the crocodile skinks, the chinese crocodile lizard or one of the caiman lizards, all of wich need a very expecialized care in order to trive and none is recomended to begginers. I think you should set another terrarium apart for a much more easier lizard to take care of like a bearded dragon or a leopard gecko, and dedicate this tank for some hardier species like aquatic turtles or frogs
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