We all having a "starting point" and your starting point will be different from everyone else's.
You will be using the tools that you have at your disposal and you'll do what you can.
You need to start NOW. Whether it's a Wednesday, a Friday, during a weekend or even in the middle of the month, you need to start. Don't wait for Monday ("I'll start next Monday after the weekend"), as every day is a good day to begin your journey. Yes, we may "begin" the journey many times, the aim is never to give up.
You are amazing, you can do this; so start where you are, use what you have, do what you can while you are able!