Welcome! I have only had axolotls as pets, but not any other newts or salamanders. I recommend axolotls because they are quite hardy. The difficulty would be with feeding, you need to have pellets, worms, and other food sources. THey like a variety diet. Keep in mind that you will need to purchase many items no matter what pet you buy. For an axolotl, this is a list of what you will need.
Bubbler
tank(10-20 gallon for one axolotl, 50 gallon for 2 adults is what I recommend)
Filter(I use submersible ones so that I can put something in front of it to slow the water flow in the tank)
sand(can use large river rocks but its harder to clean, you cannot use gravel as they can eat it, can use bare bottom tank but that might stress them out when they try to swim)
aquarium decor/plants/hiding spots
Overall, I bought all these items on craigslist used and paid about...
$60 for 2 50 gallon tanks with stand and hood/light
$5 on a bubbler
$4 for play sand that I cleaned out and boiled before pouring in the tank
$20 on hides and decorations
$50 for a high power submersible filter
$4 for a dozen night crawlers from the nearest hunting/fishing store every week
It is a very expensive hobby if you plan on doing it right. I have a whole guppy breeding operation I started and a marbled crayfish breeding operation I began for another food source for the axolotls. These are not recommended foods for the axolotl but I wanted to do it anyways. I tried to farm night crawlers but that FAILED
