10k hours expert
By Christos Gkoros
8h per day for 3.5 years make you an expert 4h per day for 7 years make you an expert 1h per day for 28 years makes you an expert
By Christos Gkoros
8h per day for 3.5 years make you an expert 4h per day for 7 years make you an expert 1h per day for 28 years makes you an expert