It is not stupid, it depends of your native language. For example, I won´t feel stupid if I can´t pronounce certain words because of guttural sounds.
What I can suggest is to look for spanish videos where they teach to you how to pronounce the R and RR in the spanish way. In my case, I was not able to pronouce the R and RR because of "short lingual frenulum",after several years with that linguistic problem, I was not able to speak spanish really well, then I had the chance of get a surgery and months or years later I was able to pronounce the R and RR in a good way. Since then, my R and RR is acceptable actually but it gives to me a non native accent.
Since I have been really interested in the mantras provided in the JOS´website,now I can roll the RR.
