im new here and a beginner in QGIS. I would like to use world maps with different longitudes in the centre for my geography lessons. I am trying to create world maps centred on diferent longitudes (others than Greenwich). The projection should be an equal area one, if possible the Mollweide-Projektion. Anyone has a step to step instruction? Would be very helpful!! Thanks.

I'm a beginner in QGIS. I would like to use world maps with different longitudes in the centre for my geography lessons. I am trying to create world maps centred on different longitudes (others than Greenwich). The projection should be an equal area one, if possible the Mollweide projection. Does anyone have step to step instructions?