citadel paint questions

Posted in Custom Workstation

normaly I use testors but im thinking of trying citadel since they have a better selection of colors. but im confused on a couple things

lets say I just want to paint a figure blue. can I just use that base coat shade of blue? or do I need to get other layers, glaze ,ect. and does citadel hold up well? will I need to seal it?

thanks for the help!