For a newbie in mechanical keyboards like me, which mechanical keyboard you advise me?
I am a person that is programming and writing all day, do you advise me MX blues?
Just programming and writing - MX blue would be good, if you don't mind the audible feedback (the click as you press each key).
If you don't need the numeric keypad, consider getting a TKL (tenkeyless) board - they are slightly cheaper and replacement keycap sets are also slightly cheaper. Plus they free u pa little bit of desk space so your mouse can be a little closer to the centre of your body, which is fantastic!
Go for a CM QFR if you don't want backlighting, or a Ducky Shine (TKLs coming out soon) if you want backlighting.
There are a few others - KeyCool is also popular, but not as easy to get. A 60% layout (e.g. Leopold FC660M) might be a bit of a shock if you are used to separate function keys.