I second what Advyth said. All
Ambystoma are illegal in California, that includes Tiger salamanders.
As Advyth said
Pleurodeles are a great starter newt, along with Axolotls being a great starter salamander. They are both readily available, cheap, come in different colors ( if you're into that type of thing
) and are easy to find CB.
However they both need temperatures of under 72 F ( 22 C ). If you think you would struggle to keep the temps that low, than something a little more temperature tolerant would be a good idea.
Hypeselotriton cyanurus can comfortably tolerate temperatures of 76 F ( 24 C ), and are readily available CB.
Tylototriton verrucosus are fine with temps to about 77 F ( 25 C ), but seem to be less common in the hobby these days, so finding some CB animals might take a bit of searching.
You can look at the care sheets of all the recommended species and more at this website, the care sheets are written by experienced keepers and give a ideal temperature range on most ( all? ) of the care sheets.
Caudata Culture Caresheets
Hope this helps :happy: