SYNANON'S PROFILE

Hey there.
I'm incredibly new to game creation/developing in general (I literally picked up RPG Maker two days ago) and having been through a multitude of tutorials I feel like I can finally navigate the program with relative ease.
After having experimented with basic map building and character set creation, I decided my next goal would be to create a very simple interactive room with my own unique tileset(s), which I would build from scratch... however this has proved to be a lot more difficult than building a character set. I've scoured the internet for guides and I've been over the criteria but I still run into errors and issues in trying to test it and I'm starting to feel really dumb.
I know that each tile should be 16x16px and thus the entire set should total at 480x256px. is there a palette restriction? I'm really at the end of my rope, can someone walk me through this??

*2k3 LOL