Simplest/minimal mastering technique for Logic?

Looking to put out my first short album in a few weeks, and my mixes are done. All I need to do is ensure the volume of the album is up to streaming standards and the songs sound consistent.
I make noisy shoegaze so I’m okay with things being a little rough around the edges. I’m just really intimidated by the mastering process and can’t afford to pay anyone to do it for me.
Does anyone have a simple step by step process they stand by? Also, is it okay to master the songs separately or should it all be done within one project?