I am a trained artist from the united states. I am interested in selling some my fine art and custom work.

My normal sale is more or less this:

1. somebody wants work done/purchased
2. I send pics or samples
3. receive half of money
4. I complete piece or send it
5. receive last half of pay

Reading up on things it seems like there is a lot to know and look out for. I was wondering if anybody could give me a heads up on what a transaction like this should look like or what I might want to look out for before I go posting goods? I know enough to not give my private key, I have a small amount of Bitcoin in a wallet but I am unfamiliar with any escrow services - if that helps place my limited knowledge.

any help would be appreciated