I was like this before too, I was seriously the pickiest eater, it was ridiculous!

What helped me was finally realizing that it wasn't that things necessarily tasted yucky, but that they tasted different. Sometimes of course, things really do taste gross, but often its just that you aren't used to the taste. Once I finally realized that, it was easier to try stuff. So when you're tasting a food, focus on what it tastes like: Is it sweet? Salty? Bitter? Not bad right? Just different. Remember there are probably millions of people who eat that food every day and don't get sick from it. And also try to think of it as an experience.

I have never gotten sick from trying a new food and I don't think its very likely. If it really worries you just eat a tiny bit, like a small bite. Or even a crumb. There's no way that'll make you sick, and you can slowly adjust to trying it. I never was able to eat fish before, but one night I decided to try just a bite. Then I tried a bit more the next time, and then more and more and now its one of my favourite foods.

Another thing that helped me was combining foods I hadn't tried of wash't fond of with comfort foods. For example I'd have broccoli with a load of cheese on it, or lettuce with olives (I love olives, used to hate lettuce, ahha) . It helps you adjust, and eventually you'll realize the taste of it on its own isn't so bad either.

By wanting to try new foods you're taking the first step, so good for you! For me nothing changed until I consciously wanted to either, and now I love trying new foods. It only took me a couple of years to go from absolutely hating a ton of foods I had hardly to tried, to having a whole new list (which is much healthier than before) of things I love to eat. If you want a list or something of easier to try foods feel free to PM me, I can give you some suggestions