When I wanted to get into comics, myself, I first started on Charles Soule’s Darth Vader: Dark Lord of the Sith series, namely, the first volume: Imperial Machine:
It’s my favorite comic series to this day and it really helped me understand Vader’s character. This series is a big reason why Anakin is my favorite character right now, but as others were saying, whatever characters/time period you are most interested in is a good way to start as well.
Legacy, Tales of the Jedi, Republic, Knights of the Old Republic and Dawn of the Jedi are all ones I love. But for someone new to it, I would recommend Tales of the Jedi and Republic first.