I think your Computer is good enought to run every linux you want.
First you can install linux in a vm like CptCharis sayd or you can use live USB/DVDs to test linux.
And if you have decided wich linux you want to use you can istall it on a nothor hard drive or an USB stick.
Your Computer will run like before.
I have to say Hello and Goodbye at the same time, as I am from Australia and have to prepare the evening meal.
Tomorrow my time I will bring you more information on how you can you can try Linux out from within your Windows 10, get the full benefit of your 4GB RAM, not put your Windows at risk, and if you don't like it, or wish to try another Ubuntu, just delete the folder it is held in.