Rams need stable water parameters (preferably soft and acidic) and are easy to take care of if you provide this. Otherwise, they are good fish to keep.
I wouldn't put them in a newly established tank as it willl still be untable until it older and more mature.
Mature the tank with the fish you want to keep with the rams, then add them to it.
I've heard they do well if you use RO water, but a RO unit is a bit expensive.
I'm sorry if I've said anything incorrect here, I'm just putting what I've read and heard from other aquarists.