Salut Nicolas, toutes vos phrases sont plutôt bonnes, donc je vous donne juste quelques corrections, ou plus précisement une façon alternative pour dire la même chose.

First blog post - correction will be appreciated, thx ;)

I actually don't exactly know exactly what this blog is and will be. For now, all I know is that I will probably post a few lines about things I'm interested in. Could be web development, language learning, memory techniques, education, etc. But as you will directly soon understand by spotting all the mistakes I'm doing making, it's mainly a way for me to improve my English. So don't be scared worry if my sentences are not always crystal clear. Any correction will Corrections are always be welcome ;).

Bravo, bien dit, bien écrit.

First blog post - correction will be appreciated, thx ;)

Actually I don't know exactly what this blog is about. Until  now, all I know is that I will probably post a  few lines about things that I'm interested in. Can be web development, language learning, memory techniques, education, etc. But as you will directly understand by spotting all the mistakes I'm doing, it's mainly a way for me to improve my English" These two sentences are not clear enough ". So don't be scared if my sentences are not always crystal clear. Any correction will always be welcome ;).