If you are LGBT+, how did you find out and how have you been getting on since?

As an older guy I can only say, please do everything in your own time and do it only when you feel it's right for you!

There is no shame in being 'closet' nor is there an Obligation to come-out to anyone. It is totally OK to lie if you don't want to tell that you're gay. That includes friends as well as family members. If they love you, they don't care what stuff you are getting off on. If they don't, they have no Business with your personal Things anyway.

My Story is one of Long-going self-deception. Looking back, I could have realised being gay when I was your Age, but at that time I did not even know what was going on with me or what gay even meant (no Internet, no open gays in the media, no gays in my family etc.).
After School I went to University and had crushes on several of my Student friends, but still was in denial.
I buried myself in my study and did a lot of sports, literally running away from myself. At that time I led two lifes: The 'normal' guy and the other one, jacking off on gay porn. During my Student time I was two or three times approached by gays (under the shower of the public pool) but I fled the Situation every time (today, I regret this - I love having sex in the shower :D )
After I finished University and got my first Job I had the Courage to Chat on the (then brand-new) Internet with some gays and even met a gay couple. For me that was a total eye-opener because that was the first time I experienced gay People as 'normal' and also the first time I felt, I could be openly gay! So, my coming out was very very late.
Today, I am married to my wonderful companion and we are more than 10 yrs together. I disengaged from my so-called-Family (because they are shitty jerks) but I have a wonderful new Family of friends.