I used to be pretty fit in my twenties mainly doing cardio in the gym, running and swimming but I am now 37 and have had 3 babies in 4.5 years. I have been very lucky with pregnancy and childbirth, never really put on much weight and went straight back to my pre baby weight after each pregnancy (I’m 170cm, about 58kg) but my body has completely changed shape. I am desperate to firm up all over, especially my stomach, pre a holiday in January. I walk a lot, average about 15k steps a day but due to babies / breastfeeding / covid / lots of excuses I haven’t really done any exercise at all in the past 5 years. I need something I can do at home as I don’t have any help and my husband works long hours so gym / swimming is very tough. I have never really done much strength training or weights! Where do I start please??