Wow! Thank you for sharing your photos. I used to be a very active before having kids. Now my core is really weak and age has also kinda caught up. This might actually be an interesting option that I could pick up to get fit again. I love running but have broken both ankles before so dont want to aggravate it. Keep it up and before you know it, you will be doing more than you can imagine!
Thanks @khimgoh, and sorry to hear about your broken ankles! I've always had weak ankles (I've had an ankle fracture too). I used to run regularly, but found it increasingly difficult when I became hypothyroid, so I started doing long-distance walking instead, and then hillwalking. The hillwalking has definitely strengthened my ankles.
I think any weight-bearing, strengthening exercise is fantastic for people at any age, and it really helps if you love the type of exercise you are doing! I just love climbing and bouldering, and I also do yoga, which can be very strengthening too. @exercisinghealth has recently done a couple of excellent videos on core strengthening:)