Hi and welcome to the forum.
You will be understood by all members, who will offer advice and support as you continue with your recovery.
Isolation can be and is a big part of ptsd for many sufferers, so joining this forum could be the start of being able to isolate less.
Take your time to read some of the threads of others, you will find loads of useful information, with ways to gradually feel easier with other aspects of ptsd too.
Then when you feel more at ease, maybe you could start posting bits about how you have got to the position you are at now. There is no rush and no one expects you to do this all in one go.
Good luck and take care.
Amethist