As Hakan says, check baud rate and that nothing else has tied up the port first.
After that, I hesitate to suggest this, but if you are truly challenged Windows 10 does have a feature called Remote
Assistance that allows someone else to view (and control) your computer. It sometimes works well and sometimes gets blocked by various firewalls.
If you're willing to trust a complete stranger from the internet
I'll volunteer half an hour of my time, we'd probably spend that much trading posts on the forum. If you're interested PM me for an e-mail address. I am making the offer genuinely but it is a HUGE
risk on your part, so evaluate carefully and decide for yourself.