Sheesh. Sounds like a lot of pressure to be put under. If I'd been told that was what I had to be when I arrived I probably would've buggered off.

Do I regard myself as useful to the forum? Would it somehow be degraded when I finally have that aneurysm on the toilet and disappear? Um, not really.

Forget about it being some sort of civic duty or obligation. That'll make you a boring and irritating poster and I do see quite a few like that. You can feel their consciousness of it seeping through what they write and it's rather gross to witness.

If you don't know something then ask about it. That's just as constructive as answering something. I've learnt plenty when someone's question casts a new light on a subject that I hadn't considered, and it may well be something I didn't know myself but had never gotten around to asking.

What you have that no one else on this forum has to offer is yourself. Be true to that. Find out your area of interest and pursue it.