i am wanting to organise my life - can't even organise my thoughts to come up with something that'll work

i know this is no cure for ADHD, but i am hoping to vastly improve my life by just organising it. i've purchased a pocket notebook that i am wanting to use as my physical working memory. i also use google calendar but not very well.

i basically need to help myself by writing things down so i can remember them, because i simply forget everything. i also need tasks split down into small steps. ive got big dreams but can't seem to organise myself to achieve them!

so my question basically is, has anyone found a way that works for them to help organise their thoughts and life in general? for example, you write everything in your 'everything notebook' and have some kinda system to then input things into a life organiser??

lol no idea whether this makes sense, but i just want to do better you know haha