Grammar wise it looks fine to me. The statement itself seems a bit vague, but I'm sure it fits better in context.

The sentence as a grammatical structure is correct ,but using "things" with tiresome is ok for a casual small talk or a personal letter to someone ,but to write it in an essay or some more formal correspondence it doesn't sound nice .You would better use for example , synonyms for the word tiresome like annoying , tedious , tiring , and instead of things you could use , issues , subjects , matters , concerns .(it depends on the context of the sentence).

hi nana how are you ? how is your english ? I think your english is getting better Don't worry about grammar I'll give you this rule (more you will read more you will wiite moer you will listen more you will speak) my Engish is not realy good I think you are better than me I hope our English is getting better soon ..... (be optimistic)..... mhmood