Many readers do not read reversed cards. Sometimes, a random reversed card might show up in a spread and become important by its unexpected appearance. But in general, all the answers you need can be found amongst the upright meanings of the cards.
However, if you do decide to use the reversed meanings of the cards, only the suits of Coins and Cups would have reversed meanings. The cards from the suits of Swords and Clubs are not traditionally considered to have reversed positions. But modern readers may, and often do, make exceptions.
Usually the reversed meaning of the card is the upright meaning interpreted through a negative lens. Sometimes the meaning of the card is simply weakened and diluted. Or alternatively, the positive meaning of the card will be realized but only after delays and problems. Whichever meaning you choose to use will depend on the surrounding cards and your own intuition.
For example, the Four of Coins has a general meaning of money flowing in towards the querent and its keyword is prosperity. It represents financial stability and success, contracts, deals, gifts, loans and investments. But reversed, it represents money flowing away from the querent or obstacles blocking the arrival of money. It could represent expenses, financial problems and bad investments. But this concept could also be shown by the combination of Four of Coins plus the Five of Swords without the need of reversed cards.
Selected meanings for reversed cards have been included in this book. It is up to you whether you want to include them in your readings as interpretations for reversed cards or interpretations for badly aspected cards. Alternatively, you could simply ignore them altogether.