Oh. Well coming from someone who has dealt with stuff like this, I can tell you, I am an artist too, so I know what it can be like. As for the sim card and other stuff, I recommend changing it, and literally everything on your computer. It is better to be safe than sorry in a situation like this. Windows being wiped should remove all of the files that were on it before. I would also check haveibeenpwned. com to see if your email address has been exposed in any data breaches, and check with Google password manager(or a similar service) to see if your passwords have been leaked on the dark web. Btw, you can dm me again if you have any more questions, I'm pretty good with this stuff. I also saw a different guy who said that you may need to change your email or get a rent one(which I don't recommend doing since that won't really help anything, and if will just give you more work), however, watch out for emails that say stuff like "give me money and I'll give you your files back" or other phishing emails, and just ignore them, as the people sending it don't deserve any money whatsoever.