With my records i just always slipped the vinyl into the plastic open to the right, then into the paper sleeve open the the right, then into the cover open to the right the into the outer plastic sleeve open to the right so i didnt have to do much but shake it out before a play. Since being convinced ( by my experience ) that audiophile pressings  are ‘generally ‘ the bomb I’ve now begun a 90degree thing where i have to rotate every insertion 90 degrees so the openings are never in line I’m beginning to wonder if its worth the hassle?

I've always had the plastic inner bag (containing the record) facing the opening (to the right of the sleeve).  If the record comes in a paper sleeve, the paper sleeve will be rotated 90 degrees (facing upwards).  The protective outer plastic sleeve will face to the opening, to allow easy extraction of the record.  The records are stored with the opening to the back of the cabinet in a clean environment.  I've never had a problem with dirt getting in.