Best way to get feedback before selling is go buy a few small things. Most people just look at your feedback number and to see if its positive or not.
15-20 feedback is the magic number to not scare bidders away.
Don't go international quite yet, your new and its probably just going to confuse you and the risk for loss is a lot higher.
Shipping on that item should be $4-$5 tops.
I generally start my items at .99 cents and let the market see what they're worth which is a great way to encourage bids, but if you're nervous about doing that start the listing at $15, and they should still get at least a few bids.
Another quick tip, if you get someone asking insane amounts of questions, then asking about insurance and odd payment methods, BLOCK THEM.
These people are nothing buy trouble and will likely leave you a negative if the wind is blowing too hard or just flat out rip you off.
Good Luck!