Need financial advice for someone who's finally starting to think about growing the earned money

So, I have a good stable income now. But life's getting serious by the day as I grow older by the day. Need to start taking more financial responsibilities overtime when parents take their retirements in a year or two. So, thinking for starting somewhere now, small, slow and steady, before the big step up comes in.

Have a lot of questions, related how to save, invest, spend, FIRE, MF, trading and so on. So, don't know where to begin with.

Any heads up would be helpful for me to keep the conversation going with you.

So, starting this like a conversational thread, as a reference for me and many more like me.