私の日本語力はとても基本的なレベルです。
Watashi no nihongochikara wa totemo kihon-tekina reberudesu.
I have been teaching English to speakers of other languages for over forty years, so my experience includes every aspect of students' wants and needs. I recently retired (from the Ministry of Foreign Affairs, Kasumigaseki) but I still want to exercise my skills.
My reputation is based on my students' success. My students get what they want!