Is it normal to think physics is confusing

No one ever said it was simple.

The only thing I don't get in physics is that how can an object have a reaction force going upwards ;s

IN, unfortunately.

I'm training to be a Physics professor , and yes I do sill find it confusing (not all the time).

Your normal.

I was never confused by physics, but I was confused by biology. Like Momonator I think the quality and style of teaching makes all the difference.

If you don't understand something, see if you understand it when someone else explains it of if you read it on wikipedia or something.

I think it's cool but not for me. I guess the teacher can make a big diff.

It wouldn't be normal if you weren't confused about Physics

Sure!