There are many things to consider when choosing a license. It is all very personal to what rights you want to grant and what risks you are willing to accept.
There is a nice tool I came across that can help you assess which license makes most sense for your open core free version. https://choosealicense.com/about/
As for commercial terms for the paid product, I would recommend seeking a legal resource to assist with those because you will want to make sure you are adequately protected. It is not as easy to simply copy someone else’s commercial terms because every product has differing risks, and every product owner has differing risk tolerances. A small investment in a legal resource upfront is significantly less expensive than hiring an attorney on the back end, once a problem arises.
There is a nice tool I came across that can help you assess which license makes most sense for your open core free version. https://choosealicense.com/about/
As for commercial terms for the paid product, I would recommend seeking a legal resource to assist with those because you will want to make sure you are adequately protected. It is not as easy to simply copy someone else’s commercial terms because every product has differing risks, and every product owner has differing risk tolerances. A small investment in a legal resource upfront is significantly less expensive than hiring an attorney on the back end, once a problem arises.