Purchasing insurance (what kind?) to cover myself and my work

Hi! I’m currently in certification and am excited to be a coach. I’ve read (and it makes sense to me) that we can just start coaching now, even before becoming certified. I’d like to offer free coaching, and I’m wondering about insurance (for myself). I don’t know if this is covered at some point later on in my training, so I’m asking here. Is there a common type of insurance that coaches sometimes purchase, to cover themselves in the event of some kind of wrongdoing lawsuit? I know it is a personal choice, but I would probably like to purchase some kind of insurance, so I’d like to hear about what kinds of insurance (and how much) some others have purchased, as a starting point to looking into the matter. Thank you so much!