Or in other words, Matthew 6:5-15. Don't use prayer to boast your image of proper religiosity(*). Find yourself an intimate secluded space and reflect on the words of prayer. Don't just mindlessly repeat the prayer like a mantra . That's good for shamanic trance at best. The text of Lord's prayer is then pretty straightforward IMO. And just for the record, and as you certainly know, the version in Luke fits perfectly within Matthew.

(*) In other words, don't use prayer just to improve your "social score”.