>>15828935huge who fan here, your gonna get a lot of troll answers here, so here are some actual valid options
Option 1: Start with the first season of the revamped series(anyone calling it a reboot is wrong as the entire old series is still canon and will be referenced lightly at times). This features the 9th doctor and is prolly your best option as it was designed mainly for people who had never seen the show before and will slowly introduce all the major concepts over time
Option 2: Start with season 5 or the revamped series, which features the 11th doctor. New production team takes over, and with both a new doctor and new companion its a fresh start in many ways. It also has better production values then earlier eps. In many ways maybe smart to start here, see if you like and if do go back to season 1 of new series and watch from there. Only DOWNSIDE to this, is you will be a little lost at times, since they assume you know some basic things at this point.
Option 3: Start at third doctor of classic series. New doctor and new companion again is fresh start, and this features a more action oriented doctor with often a military theme. It's a nice way to see if you can like classic who.
Option 4: Say fuck it and start at episode one of an unearthly child, very first ep of show ever, very risky if not already a fan
Hope that helped OP, enjoy the show its really great at times
feel free to ask any other questions