Hi Vinouche
Firstly sounds like you're doing all the right things writing down your questions, writing stories and considering getting involved with caligraphy. Good luck with your next oncologist appointment.
Also given what you've been told by your oncologist I think it is very important to let your friends that don't already know know what are going on and ask for their support. Perhaps prior to speaking to all of them, including both that know and don't know, work out what support you need, it could be practical ie driving you, provision of meals, shopping, cleaning, coming with you to chemo or when you see the oncologist or could be emotional ie spending time together doing enjoyable activities, them doing the extra leg to come to you, a convenient to you location etc so you can be clear about that as people often don't know what they can do.
Also remember to make use of any health/govt services that can make your life easier as you need them, for example, meals on wheels, cleaning, drivers so you can call more on your friends for emotional support (although some people like to do practical things for their friends to show that they care) if their time is limited so the time they they spend with you can be doing something fun.
Good luck and hugs from Deejjay