I've thought for a long time about writing about my life and I have to a certain extent, but I'm usually anxious about how my writing about my experience will make others feel (family members, people from past chapters, etc). That typically drives me towards places like this, sharing from behind a pseudonym. But that tends to become disjointed or feel detached from reality, and like I can't share it with people I know for fear that they would be insulted. Somehow it just occurred to me that I could write the stories, but abstract them away from reality a bit... I could be the author, and I could rename the main character, then I could base the stories on my life, but sidestep some of the awkwardness by claiming it's fictional. Ugh... I hate this loop. But at least I'm writing something, right?
Have you ever heard of the Japanese 'I-novel' (shishôsetsu)? There’s a whole tradition of fictionalised autobiography that is seen as entirely legitimate and artistically praiseworthy. Writers like Kenzaburô Ôe (a Nobel prize-winner) and Osamu Dazai, if a bit dark, are among those to explore. 'A Personal Matter', by Ôe, is particularly autobiographical and very short. You might find something encouraging in these kinds of writers.
If no one in your family is aware that this pub exist, that you never used your pseudonym elsewhere, that you don't tell any informations that could be linked to you in your writing (exemple : city names, country, adresses etc) and that you change names. I think there are really no risks. Who would think to be looking for you here ?
I guess the challenge isn't really writing my whole thoughts, it's the desire to be my full self in every context. To not have to filter my writing online for fear of exposing some real detail about myself, and to not have to filter my speech or ideas around the people close to me, for fear of causing confrontation with friends and family that hold tightly to a faith and a political worldview that I've left behind.
Well, like I said. If no one knows that you write online and that you don't say real names or locations, I don't think you need to worry about any confrontations. I know what it's like, though. I threw away all of my diaries and began covering my traces online where I feel that I said too much about my personal life.