I have a strong desire to write about my life. Call it a memoir if you want.

I've been writing diary entries and it's extremely therapeutic and it helps consolidate my mind.

But I want to take it a step further and write about my entire life. The only problem is that I know this would take a long time, and I'm concerned that my writing style and perceptions will change as I write it, to the point that the beginning of it is noticeably different than the end. Hell, in the past 9 months of my diary entries, I've noticed a very drastic change in my perceptions, attitudes, beliefs, and is reflected in my writing style.

I don't really know if I ever plan to try to publish this, I might just keep it for myself, but it still seems like something I can't really reconcile.

Does anyone have any advice on this? I feel like I might just be using this as an excuse to not start it, but I want to know if it's unfounded or not.