If you don't already maybe think about adding some core building body weight exercises into your daily routine too. Like the plank, body bridge, catapults, one legged squats, crunches etc. adding ankle weights or light dumbbells if you want extra difficulty. That and yoga are part of my daily routine to help with my core strength and flexibility with no need for gym equipment. I’ll also do things to have exercise just part of my daily life like taking stairs instead of elevators and a brisk walk or stair climbing during a work break etc.