How do I open up about my feels and emotions?

I'm 26 and I still haven't worked out how to talk about my feels and emotions with my family it think it's have a detrimental effects on me , the only time I really opened up to talk about that kind of thing is when I'm very drunk or when I'm hard pressed to do so usually by my mum .

Almost always when someone asks me how I am doing or am I doing alright regardless of how good or bad I'm feeling I will say I'm fine or I'm ok or I'm doing good, I guess I don't want to make fuss or for people to think differently of me so I just keep it bottled up instead.

How do I talk about my thoughts and feelings/ emotions when I find it hard to ? How do you manage it ? .

Thanks for reading this.