>>>what would be achievable as a PPL(A) holder with approx 100 hours and some aerobatics experience?<<<
A realisation of what those footrest things are under your feet
A lot of fun
And some real spinning, you will be instructed in spin recovery at circuit height!
You should get some X-country in and might solo but if you don't you probably won't be far off as long as you build up on the experience.