I love to talk about nothing. It's the only thing I know anything about.

In Irish would it be ? - Is breá liom bheith ag caint faoi rud ar bith. Tá rud amháin atá a fhios agam faoi aon ní.

I do not much want you to help me a little bit.

That is perhaps a difficult one because there is no "nothing" in Irish, just a lot of "anythings", e.g. "rud ar bith", lit. "thing on earth" or "dada" lit. a iota, a little amount.
There is no word that means literally "no thing". To obtain the meaning of "nothing" the sentence must be negative. But "I love to talk ..." isn't negative.
I don't know how to translate this properly.

But some remarks:
I love to talk = Is breá liom caint (bheith ag is superfluous. It means "I love to be talking ...")
*rud atá a fhios agam -> rud a bhfuil a fhios agam = a thing that I know (the little "a" is a possessive adjective "its knowlegde". It requires an indirect relative clause),
but:
bheith a fhios ag = to know something, always without "about"
to know something about it = bheith eolas agat air,
(And, of course, "air" requires an indirect relative clause, too.)
It's the ... = Sin é an .... You cannot use tá here

So: Sin é an t-aon rud (amháin) a bhfuil gach uile eolas agam air = That's the only thing I know everything about it.

Go raibh maith agat, a chara.

Céard faoi seo

Is breá liom an chaint gan ábhar. 'Sé sin an t-aon shórt cainte ar a bhfuil eolas ar bith agam é.

_________________
ЯГОН ТОҶИК НЕСТ ИНҶО???

Addition:
A way to translate this is perhaps:
Deabhal rud ar breá liom caint faoi.
= I love to talk about nothing.

I think you can safely say:

Is breá liom (a bheith) ag caint faoi *thada. Sé an t-aon rud é a bhfuil a fhíos agam tada faoi.




*In Conamara we love putting Hs in everywhere , but I think you can spell it as tada too.