I have an itunes account on my windows laptop

I recently purchased an ipad pro and have downloaded 23 songs to it through itunes. When I try to add these songs purchased from the ipad pro to my itunes library on this windows laptop...they cannot be found. I've tried usb hookup to transfer the songs to my windows laptop, but have not had any luck. Can you help me figure out what i need to do next. I tried signing in on this laptop with my apple user id, but it just says wrong account...please retry. I even tried subscribing to apple music hoping it would correct this problem and make all my purchases available to both devices. How can I get all my itunes purchases on this windows laptop, and also showing in my ipad. Currenlty the only songs I can see in my ipad are the ones that I purchased on the ipad.