"Cha toil leam seo."
Translation:I do not like this.
Close! "Cha" means "is not" and is the negative of tha (is). "Leam" derives from le + mi.
Le is a preposition meaning with, by, and mi means I. So "leam" is a prepositional pronoun, and that's where "I" is hiding out. (I gather this is typical for Scottish Gaelic, so expect more.) "Toil" means delight, pleasure, and seo is "this" -- so the whole thing means "This is not delight with me." See: https://en.wiktionary.org/wiki/cha_toil_le If you haven't found the tips and notes -- while they're not accessible from the duolingo phone app, you can navigate to them on any webbrowser, including your phone's webbrowser.