Helo a bore da! Sut wyt ti? (Hi and good morning, how are you?) 😃 I have also done some of the Irish Gaelic lessons on Duolingo and plan to return to them at some point.
My impression is that Cymraeg has easier/more phonetic orthography than Irish Gaelic. Also the system of mutations seems a bit more intuitive, but that could be a function of how the Duolingo course as well as SaySomethingInWelsh introduce them.