Warm welcome to steemit!
I am sure you will be just fine on steemit because this is one of the least toxic platforms and even if you are a little shy, people are still going to show their appreciation if you create some good content and I am sure you will. I also love writing on all sorts of things, so will follow you and can hopefully help you if you need any help!
In case you find the time, check out my content and follow back if you like.
Cheers, Tjark!