Not that the “flavor of the month” comment was really aimed at anyone here but I know kind of that thinking. A lot of the time it seems like I jump into things and then I’m onto the next thing. It’s hard for me to stick to something for very long (I suppose you can count my marriage as an exception!).
I haven’t told many people IRL about attending Mass and taking RCIA b/c I assume there will be comments and assumptions that I’ll get tired of it and move onto something else. Of course these could be poor assumptions of my own.

I actually take great comfort that I won’t be confirmed for a good while. Lots of time for prayer and reflection.
To the OP, I’m sorry to hear of your failing health. I’ll pray that God provides a way.