Is it too late to start?

New season 0.3 will start late August. You can start playing to get a feel of the game right now, then decide to continue when the new season starts. I would recommend searching for SSF builds since it is fairly difficult to obtain gear with the currently fairly inactive market.

Play LS deadeye. Easy to put together even this late in the league.

The 2 hardest slots to get weapon/amulet are uniques making it much easier.