welcome to the linux world!
I assure it is fun, absolute fun.
Forget about viruses, slowing down by time, freezing, and all these nasty "features" of M$ (microsoft) and it's windoze (windows). The beauty of linux is not only it is "free", but also it is run by the community, people like me and you and other members here.
You can ask for help, give help, exchange ideas, discuss things and above all, make friends.
I myself have been on linux since about 10 years, 10 wonderful years, I lived - in regards to my pc at home at least - in peace of mind.
I am sure you will enjoy linux, linux mint and the community.