I would like to post a picture of a project that I have done but don't know how to upload the picture. Can someone give me some instruction on how to do that?

Go to Projects top 3rd from the right hand (title Projects)
In projects there is a button on the right that says upload your project click on that.
Give your project a title and then any info you want to share.
then click on browse locate the picture you want to use click on save
then click on upload and save again.