I found an old laptop and waited for it to sync, and I set mining to "solo mining on".
How do I know if it's mining in the background? Also, sorry for all the questions but I have one more :-)
How do I find my HODL address?
Thank you for all the help!
To know your mining see this guide
https://github.com/HOdlcoin/HOdlcoin/blob/HODLCoin0.11.3/doc/README.mdin that guide you will see this info
Once you have have started mining in the lower right corner, you will see the

switch to the Pickaxe

From this
To this
To find your hash
First push this button
Then scroll to the bottom