Datron make great tools and all but for new users who are very likely to make tool breaking mistakes during their learning journey. In my opinion it’s better to start with low cost tooling and stepping up after they are having success. Breaking high dollar endmills is beyond painful and there are several low cost single flute options available on various sites like Ebay and Amazon.
I started on a stock So3 with 6mm ebay single flutes after reading VinceFABs thread years ago.
it’s worth the read.