Hello haplotm70,
You can start taking a look into my phylogenetic T-M184 tree work:
https://upload.wikimedia.org/wikiped...-M184_tree.png
Then, perhaps you want to read some papers about the 7000ybp ancient settlement from Karsdorf, Germany.
Also you can look into your 23andMe y-chromosome file and try to find out if you belong to T1a2 or T1a1. Then you can go further deep testing with FTDNA or Full Genome Corp. Better if you can order Y12+BigY or Elite 2.1 but the cheapest alternative is order T-M184 pack.
Haplogroup T1a-M70 perhaps could be found in the deepest root of the Neolithic spark.