hmm, "classic version of tp", that implies we have moved on from that. That is not true, the classic version is more equatable to the common dialect. However since it is common usage still, "classic" isn't really the right word.
Pu is the actual TP, Sonja who published TP first in 2001, which caught on pretty well, and then in 2014 finally released the information clarifying the actual way of TP.
Ofcourse by 2014 people already had mastery of their own ways using TP already, and there are already online resources for learning TP in different ways and different dialects, and they tend to have with them sets of tests that test your mastery with respect to that information.
So your question probably seems strange, since this is already built into the learning resources online already.
Also you could make your own new language based on what you have so far understood about TP, if you want. However wanting to modify TP really is crazy. People who want to change TP, fall into two main camps;
1. They want to add robot arms to a tree, so it makes cups of tea. OR
2. They want to sew the leaves of a tree together, so it functions better as a umbrella.
For 1; a tree is not supposed to make cups of tea, you want to make completely separate machine that does that.
For 2; a tree already functions well as a umbrella, just let it grow, sewing the leaves together will just destroy it.
Trying to modify something you have not fully grasped is a fools errand, for all you know it does do already and very well, that which you wished it would do, you just have not learnt the nature of the thing yet.
Follower of the official dialect of toki pona as presented in the official book; Toki Pona, The Language of Good by Sonja Lang.