We humans are natural procrastinators... we like to plan to start things we really don't want to do later. Maybe Monday, or the First of the month... or maybe for New Years, after the holidays.
Of course when those days come around we still won't want to do it. If it was something we wanted to do we'd already be doing it. So Monday comes around, then it's Tuesday... then it's might was well just start Monday as the week is half over already.
The difference between success and failure is action. Start now, not tomorrow, not next week, not after the holidays. If you want something start now. The time will never be perfect, you're probably never going to run out of reasons not too. But by starting, even if imperfectly, at least you are moving forward. And as long as you are moving forward you'll get somewhere.
Start and stay committed to continuing, even when you might not want to. That's the secret to succeeding in so many things.