Welcome @BrightonFiona, it's funny how a big birthday on the horizon can focus you suddenly on a goal - similar thing happened to me as I approached fifty!
You'll find this forum super-supportive and helpful, ALL the questions and answers are here and there are loads of members with inspirational stories. Best of luck - remember to get out the tape measure and measure everything now, I didn't do that at the start but wish I had, it's great to compare your progress to your 'day one' stats.
Good luck everyone today, have a good one