Nono it’s fine! It’s kind of a good question. 

I started out with lit just posting drawings for fun, my art wasn’t that great before but I just kept posting for the sake of the hobby. I continued to draw and draw, just post as much as I like. In the way, I gained followers and also improved my skills. It took me a while to open commissions tbh because I just love what I do and I didn’t want to prioritize it as a job. The time came where I’m jobless and it’s hard to live as an artist in my country, I resorted to doing commissions and freelance, since I have more opportunity from all the work I did online. 

She can start commissions if she wants to. A creation of anyone is worth a lot after all ‘ v  ‘ Use Paypal invoices and make sure you know how to use it. And the safest is to charge payment upfront before you start doing anything, unless you’re the one who’s going to scam but I’m pretty sure you’re not going to do that. 

Reposting. It’s very simple. If you don’t want your art reposted, then don’t post your art. You can report, but it’s a never ending problem. Whatever you post in the internet, ppl will still repost it. The internet is pretty big, only a few of us knows the ethics. Yes, it’s really annoying. Maybe you can tell your sister to place a really noticable watermark. Tbh, I don’t mind reposts anymore. I got tired. 

Please tell your sister good luck and the most important thing is to just keep drawing!