The second part, is the fact that I'm not that good, yet. If I started changing setups at this point, i would end up chasing my driving errors rather than the track.
It's not so much about changing set ups as it is getting and maintaining a good baseline. That's where getting some track support helps with some coaching. The basics include your cross weights, alignment, camber/caster and pressures. Even at this stage your pressures are likely going to need to be adjusted at each session due to track conditions.
Have fun!