Translation of infest in German

Study material is not easy to find. Unfortunately I have not received any such material yet. To give your students brochures and leaflets is in my opinion not the ideal. It cannot be compared with online studies.
As mentioned in our conversation, I will send a more detailed description about all the other exercises. As indicated previously, I believe in your technical skills and in your talent.
I have learned German for one year and I would like to intensify my studies. Do not know how yet... It is very difficult at my age to start new projects in life. I am over 75, did I tell ya...