AFAIK, Electrum and Blockstream Green Bitcoin wallet support both coin control, RBF and CPFP.
Newbies don't have to know the technical stuff behind RBF or CPFP, or anything to that extent. They just need to know how to remedy something like this, which the links in the first reply has covered together with pictorial illustrations.
I tend to agree when there is a stuck transaction from a newbie and we suggest this RBF and CPFP might don't know the proper procedure. However, there's an alternative when there's a stuck transaction, you can also use accelerator service and I highly suggest using ViaBTC as the best service to accelerate your stuck Bitcoin transaction.
Anyway, for those who didn't know how to use RBF and CPFP, this thread is very helpful. BTW, can you also include the relevance between RBF and CPFP?