Need advice on learning French (Dubai)

Greetings fellow expats! :)

Again and again I am faced with the same issue. For a successful immigration, I need to bring my knowledge of french to a tip top level.

The issue here is the fact that I tackled all three languages that I know by ear and to this day I am not familiar with the grammar of all three. My rule of thumb is: if it sounds weird, then it is wrong, and so far it has been working for me perfectly.

Can someone please give some advice on intence courses, or private lessons here in Dubai, which can help me get DELF or at least DILF certification? Happy to travel wherever is needed for the lessons as long as they get the job done.

I will be very grateful for any advice on the matter!

Sincerely,
Dmitry