R studio Learning resources on quantile on quantile regression, quantilogram and wavelet techniques

Hello Friends,
I am new to R and interested in learning some analysis techniques like WAVELET, quantile on quantile regression, quantilogram, etc,

I am trying to find some resources, materials, or videos but can't find anything. Can someone please share resources about these techniques in R or teach these techniques? I am willing to pay if the fee is within my range.

Thanks in Advance

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