Mutli Display Macbook Pro

Is it a 13" or a 15" MacBook Pro and also if it's a 13", has it two thunderbolt 3 ports or four?

Taking the lowest spec 2017 model you have info on what displays you can handle here:

https://support.apple.com/kb/SP754?locale=en_IE

Video Support
Simultaneously supports full native resolution on the built-in display at millions of colors and:

One display with 5120-by-2880 resolution at 60Hz at over a billion colors
Up to two displays with 4096-by-2304 resolution at 60Hz at millions of colors
Up to two displays with 3840-by-2160 resolution at 60Hz at over a billion colors
Thunderbolt 3 digital video output

Native DisplayPort output over USB‑C
VGA, HDMI, DVI, and Thunderbolt 2 output supported using adapters (sold separately)

What you are looking to do is use clamshell mode, this is detailed here:

https://support.apple.com/en-us/HT201834

There is detailed information here that should help you also:

https://www.howtogeek.com/443460/how-to-use-multiple-monitors-on-your-mac/

"Adapters for the Thunderbolt 3 or USB-C port on your Mac or iPad Pro":

https://support.apple.com/en-ie/HT207443

Lastly, this video may help:

https://youtu.be/v1KE84Ccjvo?t=276