@bridgida Honestly just go on youtube and look up a few beginner yoga routines, thatll do fine for most of us. I also do the tried and true stretches that you probably did in HS after I warm up a bit.
@bridgida 41 M here also with 3 young kiddos, as was mentioned below , resistance training for sure but mobility is huge. Make sure to include a solid stretching regiment, it helps way more now than it did when I was in my 20’s.
