The last things you’ll need to care about at this stage are the album artwork and the manufacturing of your physical record. People usually care about the packaging of a product and the cover image may also get a lot of attention, and thus you’ll have to really care about it.
Some people will tell you that in the age of streaming all of this will not be important anymore.
But that's bullshit of course. Nobody thought that the design or even the colour of a computer would be important until Apple introduced the iMac either. People care about the look of a product – you would never buy an ugly car even if it would still safely get you from A to B, and you still care about the colour of your clothes even if the colour itself has no impact on the basic goal to just cover your body and to keep you warm.