Well, you're going to have to learn the basics in a mighty hurry, because if you're not using Photoshop, all this worry about calibration is entirely pointless.
The file you just posted is untagged. This is a problem, not just now but always. Never save photos without their profiles.
Make sure the profile box is checked when saving. It will look something like these:
Can you save and post it again for me, along with some others?
What I fear most is the worst-case scenario that you do this check and find out that your files aren't sRGB after all. That would throw an element of doubt over your prints. They might be ok, or they might not.
Ok, that'll do for now.
Yes, that will also be sufficient for now. I hope you'll get some black-and-white photos at some stage in the future, though.
Do you mind posting the photos you have, to show me?
Ignore all of this nonsense. James seems to be correct, but you honestly don't need to worry about any of this stuff. It all happens automatically, and very safely.
As long as your files are sRGB (the link I gave earlier will confirm) then no, you don't need to do anything else.
Holy crap!! No, this is SO wrong. Peter is an idiot of the highest order.
Please read: https://www.damiensymonds.net/2010/02/please-ignore-your-monitor-profile.html
Also this: https://www.damiensymonds.net/2012/01/web-browsers-and-facebook.html
Nope, this is all bollocks. Your screen is fine. I mean, it's true that there are much better screens out there, but you must not concern yourself with changing it at the moment. It will calibrate fine.