Hi Norman,
welcome.i am new to Axolotls as well, and have several tropical fish tanks as you do.
.Hmn...easy? that is a good question. Actually I think it is about the same as fish keeping, which if you are concerned about keeping your fish healthy, and taking into account their needs, (particular varied diet, good water conditions, compatability, water temps. etc,) is not really that easy. I also have birds which are very demanding and need allot of work to keep cages clean and feed a varied diet.
Keeping clean balanced water is very important. I do know some folk who have never paid much attention to water in their tanks, hardly do water changes, and can't figure out why their fish die, then go out and buy others, only to have them die after several weeks or months.
I suggest you read up on cycling the tank and read the suggested sites before you buy because they are cute.
(not saying that you wouldn't.)
i take any animal or fish that i take into my home very seriously, and try to learn all i can to make sure they have long, healthy lives, as they are totally dependent on my care.
hey! I agree they are sooo cute and fun to watch. ! good luck and hope you find the right axie for you !!