What do I do?

It's been 4 years since covids gone and I'm still having trouble making friends. I used to be a introvert but now it's like I don't talk at all unless and until someone comes to me first. I have basically became a hikkikomori of sorts but not exactly. Now that the projects and everything that are taking place, we are required to make groups but I can't seem to ask to other students other than 1 or 2 people. Also I don't know how much is too much talk to share with a person. And then the person which I thought were friends with me doesn't seem to form group seriously. Idk what to do. How do I start having conversations and talk with people as I would be needing more of communication skills.