How to practice boxing?

I want to get in shape and at the same time work on self defense. I’ve never boxed before and have no boxing bag at home or any gyms really that are close by. Are there any boxing drills I can do at home that will help? Also my punch is very awkward looking. I was motivated to do it by watching the creed movies and life and my new job have been very stressful lately.
How to practice boxing?
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