How to filter django model ?

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Python

Django

Suppose we have a model of 100 courses and we want to select only

1. How select only first 10 courses.
2. How to select only in the range of 30 to 40 course.
3. How we can skip first course.
4. How we can select only first course.
5. How we can select only last course or skip the last course.

Please tell me, how we can filter django models.

What I have tried:

I have tried this

courses1 = Courses.objects.all()

but could not filter it. Please help me.