Diolch! 
My lessons are filled with moments of frustration when I forget stuff or struggle greatly, and moments of laughing helplessly at ridiculous errors I’ve made, like mixing up words and stringing them together in ways that make no sense.
The funny thing is, I’ve been aware of CH and rolled Rs for a long while, though I wasn’t that good at CH, and was no good at producing a rolled R. Perhaps the R is formed in the throat, sort of like CH? 
And after reading some things on rolled Rs, I’ve gained the impression I’m forming R the wrong way for trying to roll it. Yay. 
Anyway, I’ve listened to music and sometimes tried to sing along and mimic it. I’ve tried CH, but it doesn’t always come out well, and sometimes I forget about trying to pronounce it differently in songs. 
And I tend to envy everyone’s rolled Rs without making much effort to duplicate it (or get around to looking up explanations of how to say it, apparently).
The LL sound, on the other hand, was a new concept to me, and for whatever reason, I proceeded to hyper-focus on it. So those aren’t as intimidating to me. But CH is touch-and-go, and trilled Rs just don’t happen.