When I recently became interested in Buddhism I decided to pick one tradition and stick with it for one year. I did some research and was drawn to Theravāda's down-to-earth approach, particularly Burmese Theravāda. If after the year is up I feel that I haven't found what I'm looking for I have the option of looking elsewhere in other traditions or schools, but I don't think mixing and matching would be helpful for a beginner like me. Buddhism has so many different traditions, methods, and techniques that it would be too confusing for me to try learn from all of them (I'm having a hard enough time learning all of the different Pali words and what they mean without trying to learn Sanskrit too)
. A few words of advice I like to remind myself of regarding my practice is the Indian proverb, "Better to dig one deep well than 10 shallow ones." To me devoting myself to one tradition is like digging one deep well.
This is just my beginner's perspective. Maybe one day I will become interested in the Mahayana, but I don't feel like I'm limiting myself by choosing to focus on one tradition when that one tradition contains everything one needs to reach Nibbāna.
A book I thought brought up many good questions for spiritual seekers is . Here's a to the radio interview that Tami Simon from Sounds True did with the author Mariana Caplan.
The watched mind brings happiness.
I am larger and better than I thought. I did not know I held so much goodness.