patxiSounds to me as though you are putting yourself under a lot of pressure! There is no 'ought to' on here, there is no commitment to write to a time-scale. The site is here for those that have 10mins every few days or those that want to sit on it for hours and hours at a time. The important thing about the site is, enjoy what time you can spend on it and not spend that time worrying about what you think you should have done.
Please, just give yourself a break and enjoy