My first day here. Please, help with my English

Hi! It's my first post here. I'm really afraid of expressing myself in English.

The reason why I need to improve it is that the last week I get the Erasmus.

No es claro que quieres decir en esta oración. Hay dos posibilidades. 

Si ya has sido aceptado por Erasmus dices 'The reason why I need to improve it that last week I was accepted/got onto the Erasmus scheme.' 

Otra posibilidad es que esta semana es la última oportunidad que tienes para aplicar por Erasmus. En este caso dices 'The reason why I need to improve it is because this is the last week that I can apply for the Erasmus scheme.'

Personalmente, pienso que significaste la primera opción, pero no es totalmente claro.

My studies are the most important thing for me. I really need to improve my English and show that I can forget overcome my shyness.

My first day here. Please, help with my English

Hi, it's my first post here. I'm really afraid of to express myself in English. The reason why I need to improve it is that its the last week I can get into the Erasmus. My studies are the most important thing for to me. I really need to improve my English and show prove that I can forget overcome my shyness.

Hello Ana,

Your English is really good, don't be shy! I have no problem understanding what you are trying to say, there was a few prepositions and a bit of vocabulary you can work on but overall I think it's well written and clear. Good luck with Erasmus!

My first day here. Please, help with my english

Hi! It's my first post here. I'm really afraid of to express myself in english. The reason why I need to improve it is that the last week I get the erasmus. (Lo siento, no entendí esta palabra) My studies are the most important thing for me. I really need to improve my english and show that I can forget my shyness.

Otherwise, perfecto!