Try this (assuming that you also have Plots.jl installed)
d = FDist(10.0,2.0)
xx = range(-1.0,stop=20.0,length=1000)
p1 = plot(xx,pdf.(d,xx))
p2 = plot(xx,cdf.(d,xx))
Playing around with the distribution parameters will change the figure.
It is hard to help you without something more specific. I would recommend thinking of some problem/project and then going about solving it. You seem to know about probability distributions, so that could be a start. Other than that, you should check out some of the learning resources on the Julia website so that you get to understand a little about programming. Try to read through as much documentation as possible and just have fun with it!