2. Is it safe to run a node in my computer? Will it damage my content in my computer or will my computer be attacked ?
While you said in your website, that you will not be responsible for any risk. Even you can't evaluate the risk, how about us?
Think of it as running a TOR exit node. Depending on where you live and who you are (individual or organization), you might be made responsible of the traffic you relay or not.
The US recently brought in new laws that make simply accessing a site through tior dangerous. They didn't make tor completely illegal, but they made it risky to use.