I believe a lot of people are doing meditation in a similar way as they would do a workout session and it simply doesn't work. It's supposed to be your time off and enjoyable. I've seen a lot of starters that are extremely focused on doing at least 30 mins a day, and it's just incredibly hard. Start small, start with whatever you're confortable with, it could be a minute for all it's worth and increase progressively but make sure that that minute is mindful.