I did a great programme for bc rehab through my oncology clinic during chemo but once I went back to work, I found it impossible to access anything. I work near the city but live in a rural area so even the sessions offered in the evenings didn't work for me as there was no way I could turn around and head back into town after getting home from work. I did access the YWCA Encore at the end of last year - I enjoyed it but it's pretty hit and miss as to when it will be offered and it is generally just a 10 week programme anyway.
So, what I have done is to develop my own set of pool exercises based on that and on what I have done in other aqua-aerobics sessions pre-BC, combined with a few lengths swimming. I bought a 10 visit pass at a pool that is "sort of" on the way home from work and go there once a week. If you were in Adelaide, I would suggest you join me! (I've actually got my MIL interested as she has some health problems stopping her from exercising. I've suggested that she goes to a couple of qualified instructors to find out what she is able to do and then come with me for company.) For me, the pool is a great exercise option. Other things often leave me tired and drained while exercising in the pool is still tiring, but also makes me feel energised, if that makes sense. My daughter trains in a local swimming squad and the coach has suggested that I join in the Masters group so I would then be able to swim when she trains. The catch is that I would have to compete a few times a year so my swimming will have to improve beyond 4 very poorly executed lengths at a time - but this may also be an option for you if it interests you and you have a local squad with a Masters group.
I have also installed a box of light weights near the couch and I make myself do a programme of these every couple of days. Again, based on exercises I did through the rehab classes and those in a book called "Strong Women Stay Young". As I am reluctant to take calcium supplements, I am hoping that resistance exercises will keep osteoporosis at bay. Not fun, but easy enough to do.
You could also see if there is a Pinc & Steel physio situated near you. I think the exercise groups differ from place to place but they also do Stand Up Paddleboarding as a rehab programme in some places.
I hope you find something. It may just be that you need to be a little bit creative.