So when you are preforming a reading with the Tarot, obviously you first choose a spread, my personal favorite is the Split Hexagram. (Before hand you should do your purification rituals and the appropriate invocations for the reading).But what’s most important, is learning how to interpret the entire reading. This will require familiarity with all the cards.You meditate on the reading as a whole, in context to the divination.
If the reading is unclear to you, or a particular card seems unusual, you can ask the seeker questions regarding the situation, they might identify that unknown factor
Then you honestly relay the message the cards have given you to the seeker.