Retrieving data from motherboard

Hello, I had a Samsung note 9 and while I was in jail my girl had it. And she put it through the ringer. There were cracks all over the front screen and back, even the glass covering the cameras were broken. Well she finally slammed it in a car door and the screen would just flash white really fast unless the brightness of the screen was turned up all the way. Well certain circumstances lead to me using it again, and a little while after I started using it this viking of a phone gave out. No matter what I did I couldn't get the screen to stop flashing and decided to take it apart, because I possibly wanted to fix it one day. Well in the process I punctured the battery. But other than that I successfully took it apart. But I need some files on that phone, s note files to be exact that didn't get backed up for some reason. What would be the easiest and cheapest way to get the data back. Is it possible to plug a USB C cord in the motherboard to provide power and access the files. I'm sure that's too good to be true and I'll need to replace all the broken parts of the phone. Such as the battery I broke, and the entire screen assembly. If that's the case where is the best place to buy parts, or should I buy a broken note 9 where I could use the screen, and the battery. I'm sorry for my poor use of Grammer etc. But I do thank anyone that takes the time to read this and give me some advice. Hope you all have a great day/night. Thank you again

Sincerely,

Nick