when you say you have trouble praying, what do you mean? do you mean that you’re having difficulty getting yourself to pray, that you feel nothing when you pray, etc?
spiritual sloth is not when we feel spiritual dryness, but when we don’t try. If we try to pray, that pleases God even if we feel nothing.
In fact, I believe that when we choose to pray, or choose to follow God, despite our feelings or in opposition to them, that pleases God even more than when we experience consolations in prayer. Because when we have consolations, it’s easy to pray, isn’t it.
When it is diffucult and we still choose it out of love for God, that pleases Him very much.