How did I miss this topic??
GW, Jacaranda - and others with similar compound leaves (ie: Poinciana etc) are very difficult to make into even half decent Bonsai. The reason is because the leaves aren't on the end of a branch as such - the 'branch' is the stalk of the leaf. In winter, all you end up with is a bare stick (everything falls off).
I have seen photos of Jacaranda as Bonsai, but they are usually very large and in large pots. Even then, there is minimal foliage on them. Just a few leaves 'mimic' a full canopy.
Even so, those small pots that come with the 'kit' would be pretty useless for a Jacaranda. What Pam said is excellent advice.
I'm not sure where you're located GW, but there are far more suitable species that you could consider - like Trident Maple, Ficus species, Hawthorn - even some of the native Lilli-Pilli's are all excellent for someone that would like a small 'starter' tree.
Edit: Forgot to mention - It's quite possible those seeds you have GW are no longer viable. Who knows how long ago they were originally collected before the kit was purchased for you.