My new 12 " Macbook only has tiny USB slot

I wanted to install MS Word from CD onto my new Macbook so I bought an external CD drive to install it. However, the USB plug on the external CD drive is too big to fit in tiny Macbook USB slot. This means my flash drive will also not fit. Does the 13" Macbook Air have tiny USB slots? Is there an adapter I could buy to fit regular size USB adapters into this tiny USB adapter? It is disappointing that I can't use my flash drive with all saved files on this new computer.

I also can't find the Applications icon in the dock. There is an A symbol, but it takes you directly to the Apple store.

And when I want to display more than one window at same time, I am unable to do it. What happens is it adds all the websites on one page (the website images are added, but you can only click on each one to view the page instead of viewing 2 windows at the same time). I tried to look at corners of webpage to make the windows page smaller, but I do not see that arrow/line in corner to make page smaller.

One more thing is the computer freezes if I leave it for several minutes. This means I have to push power button to turn it off.

I am thinking of returning it.