It isn't a matter of selecting which school so much as it is a matter of choosing which texts. Over time I chose to eliminate more and more texts due to their lack of historical authenticity, and once familiar with the Nikayas I could see for myself the flavor of the Dhamma. On this note, read the earliest strata of texts you can and study them often alongside your meditation practice - build a strong foundation, instead of buying drapes while the cement is still wet.