How can I safely come back to practicing meditation after a psychosis episode caused by meditating 2 years ago?

For background context, around 2 years ago, I started learning more about meditation, however I was very much a beginner. I learned that open-eye meditation can have great benefits for the mind, so I tried it out. First few days, I only meditated for periods under 1 hour. But on one day, I thought to myself that I want to try out longer meditating session and see if I will have even better effects from it.

So, I sat down on my bed, grounded myself and started my session. This time, I wasn't looking around as usual. For a change, I thought I could stare at 1 fixed point instead, because it was a technique I recently learned about during that time. So I did. At first, it was relaxing, but then I started disassociating. I was still present and awake, but I felt as if my body and emotions have completely disconnected from my brain. I felt like a robot. Like my body wasn't mine, and like all my emotions vanished into thin air, even the neutral ones. After noticing this, I immediately stopped meditating, checked the clock, and to my surprise... What felt like 15 minutes of meditation has been whole 3 hours. Way too big for a beginner.

For the next few days, I started showing signs of psychosis - seeing connections where there aren't any. Even when I was texting my friend, she asked "Are you drunk?" because what I was texting made absolutely no sense. I felt like I was reading my friend's mind and some other psychotic-like things.

Now for my question, are there any specific steps I can take to safely start meditating again? I think I did the right thing by stopping meditation for 2 years after this experience, but I kinda miss meditating at the same time. Are there any techniques that are more "safe" than others? As in, with less chance of causing this kind of negative disconnect from your mind and body? Should I avoid long sessions altogether, or should I instead mindfully increasing the session lenght over a bigger period of time so that I don't have too much of a "jump"?

TLDR: 2 years ago, I meditated for too long as a beginner, which caused me short-term psychosis. How can I start safely meditating again?