The phrase "who do I start" is commonly associated with fantasy football decisions about whom to start in a lineup. To start making such decisions, tools and expert advice recommend comparing player projections, rankings, matchups, injury status, and expert consensus. Using specialized "Who Should I Start?" tools or apps can help by allowing you to input players and get data- driven recommendations based on scoring systems and current NFL conditions. These tools take into account factors like projected stats, team matchups, and expert analysis to guide your start decisions confidently. If the question is about something else, please provide more context for a more precise answer, but in the common usage related to sports or fantasy sports, the best approach is to use expert tools and data sources for lineup optimization.