I agree with Borges. I only recommended Pol Science because someone on the forum said exactly what Ive said above.

Also the first few topics in IR are really boring(but still important)

For the last three days I was stuck at Realism and just could not understand the books. Then I decided to read a summary of it from the internet. I found a concise comparison of all the theories and once I knew what they were, I moved on to the next topic. Remember, you can always come back and improve your knowledge of the topic at any time. That is exactly what I did. I moved on to Power and Sovereignty and then when I came back to the theories, I found it so easy. I still haven't done all the theories.

When I find something hard to understand, I don't let it bother me. I just get the general idea and move on. I will take notes of the theories at some later point.

If you also found IR difficult because of the theories, try the above. It is a very interesting subject. Part 1 may be boring but just get through it. Do not pressurize yourself.