Not rambling at all @arnlybub! Coherent and informative. You let it all hang out here darl; many of us do and it does us good.
I struggled with that feeling like a fraud thing too. Flip it in your head: if it was your friend going through this, you'd want to help them as much as you can, I imagine. Letting people help you can be challenging for independent people who are used to being happily in control of their lives. It does get easier (especially if you have treatments which make you very farigued and/or unwell) but by the time you're used to it, it's the end of active treatment!
Enjoy your weekend. K xox