Is there a way to skip ahead in the skills?
Not yet in French, apparently. In German and Spanish there are some keyholes you can click further down in the flow chart and if you pass a test (you have three attempts), you skip to that point. French is still in beta, so I assume they haven't implemented this yet, but it will probably be available later.
Actually, yes. Just go to https://www.duolingo.com/skill/fr/Spiritual, https://www.duolingo.com/skill/fr/Economics, or https://www.duolingo.com/skill/fr/Sports, and complete that lesson, and that'll allow you to complete any lesson you wish.
I personally recommend Spiritual, because that has the least amount of parts.