Computer science helper (Native English)

No Teacher qualifications, but Calm and communicative. Native Queens English.
I could also teach Topics in Computer Science... as I have 40 Years Implementing IT projects and understanding different businesses.
My spoken German is good, but written is very poor, so if this is a prequisite, then Im afraid I cannot help.
Also, I understand German Grammer, but not all Englsih Grammer, I just know what is correct, and what is incorrect, and all the subtle uses of the english language
Probably, with travel, less than €40 an hour would not make sense
Im quite flexible