A few things about icons
The last thing we want to do is make a picture. Symbols are not pictures, they are visual condensations of a concept, an idea, an activity. While pictures tell stories that are part of a timeline, symbols show a single condensed instance - there is no "before" and "after". Symbols therefore give an indirect or abstract reference to what it is that they represent, they do not tell stories. Big big difference from a picture, and you should be aware of this difference so that you don’t end up painting pictures instead of making a logo symbol or an icon.
There are some very good websites that offer free to use icons from which you can make your selection. My personal favorite is the Noun Project, but on the left side link list on this blog I have put some others too. So, bear in mind what I said above and make your selection accordingly and you should be just fine.