I see nothing wrong with using google translate to help you. I use it sometimes, and I think that i am able to tell the difference between a good and a bad translation. At the beginning you'll probably won't know if the text provided by google is exactly what you wanted to say, but, with some time, you'll learn.

Hola, te recomiendo que no utilices google translate

First entry! good job! There's nothing wrong with using google translate or a dictionary at the beginning, as you say, eventually you will need it less and less, but is a great way to add vocabulary. Finding topics to talk about can be the most tricky part, I think it's useful to exchange short emails with someone who is learning English and has a similar level as the one you have in Spanish. Trying to translate short and easy texts from English to Spanish by yourself can be a good exercise as well. But keep writing, you are doing good!!