It's nice to hear that someone is interested in learning German by using long sentences. However, good German is still quiet short, I'd say. Just follow S-V-O (subject-verb-object), for instance: "Ich lese die Frage". Then, you can add different adjectives or adverbs or others, for instance: "Ich lese deine Frage" or "Ich lese gerne die Frage" or "Ich lese gerne Deine Frage".

Hello Eve, To know how to build long sentences correctly in german you have to learn grammatical rules one by one and then gradually you would be able to form more intricate sentences. It is not very easy ,that is true . The seperation of conjugated verbs , the "Nebensatz" and how to rephrase sentences , the late reference to subjects at the very end of a sentence, being seperated by small sentences ,all that is learned gradually by more practicing and applying grammatical rules . You should use books or online grammar sites to study it or seek the help of a tutor to explain to you those rules . It is a matter of time and effort, in the long run you would find those sentence structures quiet easy and you would be applying them automatically.... Good luck ;)