Hello.
I’m sorry to hear you’re going through a hard time, and I have to agree that staying isolated is going to make it harder for you.
I’m not a fan of small talk either - so many people aren’t, there are just some that are more used to looking like they enjoy it, even if they don’t. Oftentimes, we use small talk just to bridge a gap for deeper connection to happen, not because it’s enjoyable.
I think a good place to start would be as someone else suggested, trying online. That way you can opt out if it gets uncomfortable with no repercussion. For example, Reddit threads or Facebook groups dedicated to veterans. I did a quick search, and you seem to have some options there.
This way, you can connect with people who understand and you can create a topic to discuss whatever you yourself want. For example, if you want to meet up, you could post on Facebook to see if someone nearby is available. Or if you want a deep discussion, a Reddit thread could enable you to get different inputs much like this forum. Or you can just casually read what others are posting to feel a bit connected.
Despite all that, actually going out to be around others is always best. If there are any ANZAC events still happening at a local RSL or other venues, you could try going just to be around others. Sometimes doing this alone makes a person feel more connected and involved than staying home.