Yes, absolutely.
If I use that can I run it without making changes to my windows 8.1?
If you use a Live USB like I suggest above, it won't make any permanent changes.
If I try it and don’t like it does it leave any lasting changes on my computer?
A live USB stick like I describe won't make any permanent changes to your computer.
The only change you MIGHT have to make is in your BIOS to change which order your computer looks for a bootable drive. If you can post your computer model number, I can see if it is necessary and if so, tell you exactly step-by-step how to do it.
I admit I’m not an advanced user. Clueless would be a lot more descriptive of my abilities.
I'm not saying that this is for literally everybody. But it doesn't take a PhD in CSci like a lot of people claim.
I have a Surface Pro 3 running 8.1 if that helps.