Instead of fad workouts, basic pilates routines like Winsor Pilates and many pinned by Women's Health Magazine I have found are very well explained, focus on safety, and making the moves as effective as possible for us and they also give examples for effective modified moves for various fitness levels or areas we feel more strain. This link is one of my favorites for the full explanation and selection of moves.
I have gone back to good old fashioned moves that are easy but effective on the body with less possibility of strain on the body and joints. My favorite routines are still Kickboxing; you get so much bang for your buck and they are very fun. Pinterest pinners have compiled thousands of routines that we can all do at home, even as beginners. For those exercises, I use pre-written routines to follow easily. If you don't know the move, just type the name of it into a search engine and several YouTube videos will pull up to show you how it's done! Here are some of my favorites:
Mountain Climbers and Wall Sits are my new favorite exercises and they work! I do a lot of these routines similar to this with planks, push ups, bicycle crunches, and kickboxing routines in front of the TV. I am a huge NFL fan so on Sundays I work out through all of the games doing these moves and I love them! Here are a couple more I loved so much: