is it " mastering English" or " English mastering " or both are correct ?

This one is for teachers ... how can I be a good English teacher ?

guys I had a bad interview today unfortunately , at the beginning I ....... Guys I had a bad interview today unfortunately , at the beginning I spoke well then I started to do a lot of pauses and mispronounce some words that I already know .Any advice or help would be appreciated .

is it right to say . I will should take part in this summer course!

seeking for an English language partner to do some practice with ....