Total noob. First time i use this.

So i bought Bitcoin for 10 euros at bitmymoney.
I got the electrum wallet since it says its the most secure.
I opened a default wallet with the words and password.
Now i read FAQs both on the bitmymoney and electrum sites but nowhere does it specify how i am supposed to move my bitcoin to the wallet.
It gives me a long code starting with 1N etc etc which it says i am supposed to enter in my wallet. But where?
'Receive' seems most logical but there is a code starting with 1J already and i cant delete / adjust that no matter what i do.
I checked all options but cant find 'receive'. Only 'send' but i figure i should be receiving.

Anyone knows where i can do this? As far as i understand it as soon as i have this Bitcoin in my wallet i can do a payment with it (using the Send tab??)

Thanks.