Learning the uses of Ser and Estar (to be) can seem difficult at the beginning because they are just one verb in most languages. But if you dedicate a little bit of extra time to these 2 verbs and learn the uses, conjugations, and differences between those 2, you will be fine. Plus, you will see them EVERYWHERE in Spanish, so even if you can’t nail them from the beginning, you will just get used to their uses, by seeing them all the time.