Unrivaledneo

So I decided to play around with RO servers for the first time I've gotten great with lua scripting and someone suggested I try out RO well simply because the graphical style is awesome. Anyway I having a hard time starting out mainly because I don't quit understand what everything is use for.

There is clients, then data packs then graphics packs or something so not everything is in one download?? Hoping someone could explain what each part is needed and what it is for? I have tried getting a server running using the pre compiled era ion from the downloads section though none of the clients wanted to le it fully connect so I'm assuming I'm missing a step somewhere. Any help or full guides be great. ( I have found setup guides but nothing that goes into detail on what each part does)

Just wanted to make my first post and say hello! I'm coming from Open-Tibia projects to try and upgrades a bit into the OR world, my main project over at OT was Pokemon based system and hoping to set up similar here (once i figure out how the systems work here, best tools, etc etc) Any tips for noobs be awesome, whats the best tools to use for what. Hopefully will be able to contribute something to the community soon.