I have been in this kind of work for a while and I have had a token that was ERC based just the other day and in the end I found it was very difficult to really actually understand how to withdraw it, I realized when you have it in your wallet you just have to make sure that you have a balance on your Etherium address, that will make sure that you have the transaction fee , that will cover for the conversion to any other coin you want and in the end you are going to enjoy and though I made a slight mistake , in the end I understood it very well