Learn English – “Plan for” vs. “Plan around”

My American Heritage Dictionary shows the etymology of "important" as "[< Lat. importare, be significant]". So it's safe to say that in general usage, some meanings overlap. In certain technical or scientific contexts, however, the meaning of "signifcant" is more narrowly "having a meaning [at all]" (e.g., significant digit), whereas "important" is not a word with a precise meaning in such contexts.

Convey means 'transfer' or 'pass on' or 'make known'. In England, at least, the process of selling a house is conveyancing, for example. In general, conveying and saying are not the same thing - you can convey ideas without saying a thing (a shrug of the shoulders could convey that you don't know, without any verbal communication). So, maybe you'd write:

It's easier than it seems, but I haven't conveyed the ideas very well.

The "don't convey it well" tends to mean you've tried multiple times and are still trying and not doing a very good job of conveying the ideas to the people you talk with.

On the whole, though, I think another word, such as 'explain', is better:

It's easier than it seems, even though I haven't explained it very well.