I learned to ignore petty insults, personally.

You don't have to care about my opinion, but I will say that going to get a flat before you have secured the income to support it is a massive mistake, particularly when you are depressed in any way.

It makes me think that you're jumping onto a platform above a deep hole when you don't know if the platform will support you - and you have nobody to throw you a rope if you fall down. One should always test the platform's strength and have someone around to throw them a rope if need be. That's why you have to start off with a flatmate, at least for a short time while you learn about the ups and downs of paying for your lifestyle.

I'm not trying to put you off, I'm just telling you how it is, because if you don't accept such things then you will fail. Horribly.

EDIT: It's also notable that if you're struggling to do your lessons because of the large amount of work you're doing, and you intend on doing more work to get this flatting situation, that you're going in the wrong direction.