Op
I have a child in year 4 who is studying Mandarin and French at school. I have a lot of experience in teaching MFLs.
First of all I would not be concerned at all that your child can say hardly anything so far. Learning MFLs is a marathon and not a sprint.
My DC has two half hour 1-2-1 Skype lessons in Mandarin per week (which DC enjoys). In addition to this I play DC Mandarin cartoons for about 20 minutes most days, whilst DC is brushing teeth, showering, getting dressed and sometimes in the car. DC has been doing the above for nearly 2 years now and is progressing well.
With French DC has just been watching cartoons and listening to songs for about 6 months now. DC can say very little, but is still in the top few in his class at French. As DC is only in year 4 and I suspect DC will have at least another 6 years of French at school I am happy that DC is enjoying his out of school French "learning" and am not concerned about his level for now. I believe that as long as DC keeps his interest in French DC will be able to speak French pretty well by DC's mid to late teens.
For listening in French I often use the following:
m.youtube.com/watch?v=jC5sgHllQnU
agreenmouse.com/french-for-children/ks2-ks3-french/
m.youtube.com/watch?list=RDUsEz58BblMY¶ms=OALAAQE%253D&v=UsEz58BblMY
At a later date, when DC has a higher knowledge of French and has matured a little, I shall ask DC if DC wants on line French lessons (Mandarin has much easier grammar, and pronunciation is much more difficult, so in my opinion is more suitable to learn 1-2-1 on line at this age) and or use Memrise and Duolingo, but not yet.