Something that keeps coming up over and over again are these "30 day challenges."  Some are squat challenges,  plank challenges, some of them are a list of a few different types of exercises.  In some ways it's easy to think "At least I'm moving." or "It's good for me because I'm a beginner, I can ease into it." I'm ALMOST tempted to agree, ALMOST.  But not quite, and here is why.
Most of these challenges or lists of exercises are made by amateurs. There are VERY few of them out there that are made by some one who knows what they are doing.  You may think  again "Well who cares as long as I'm moving." to some degree this is true BUT  you are not going to get great results  in 30 days from  eventually being able to do a 5 min plank. You are not going to get  a great booty by  squatting 250 times by the end of the day.. What you will get are sore knees and other possible injuries, and very minimal results. You may even become discouraged because of:
I tell this to people all the time that  I would rather see you do a set of repetitions with weights, than waste your time  building up to 250 squats, its just not necessary, your body is going to get used to these challenges and adapt. Our bodies are way to smart for these home made  monthly challenges.
New things are being learned about your bodies every day and how we build muscles and how we train. I am a coach, I am not a personal trainer, but I've researched enough in my journey and  have been in the fitness world for over 15 years, to know the basics. Fitness is NOT a one size fits all.Every one has different body types, different metabolisms, different wants and needs.  Whether you are going to work out at home (which is what I now do thanks to beach body) or in the gym, you need to educate your self on what  type of program will work best for you.   I'm going  list a few  programs here  for a variety of different levels.

1. For the ULTIMATE Beginner I give you 10-Minute Trainer with Tony Horton