I'm wondering if this sentence has a future tense in it. Otherwise there is nothing wrong in it.
What do you mean?
This sentence is in the Future tense lesson. What I understand, it is in present tense. Also in the Paste tense lessons there are sentences in present tense (can't remember if I reported them or just commented).
Even though it's in present tense, "вдома" was introduced in this lesson, so it makes sense for this sentence to be in here.
Oh, I didn't know that. Yes, it is present
There doesn't appear to be any lessons in the tree/lesson plan for the Locative case. The word Вдома would have been a good word to introduce in such a lesson subject.