Looking for suggestions on learning to present a more "fun image"; both talking in person and messaging etc.

I was going to ask "how to be funny", but the end results I'm looking for is to "appear fun". And then the end goal of course to generally help build attraction - something I'm definitely not good at.

I've always been the logical type - I don't tick enough Aspergers boxes to be grouped in there, but I'm certainly further along the scale than some (do tick a lot of IADD boxes too.)
With people I know well I'm still not the natural extrovert, but do have a lot more natural life/good moments, while talking to strangers I tend to be less good, especially if 'challenged'.

I've seen Improv suggested elsewhere, so. (And Toastmasters, though more for building general confidence talking.)

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Anything that can be done online (or even better audiobooks etc) would be great - as I don't get much time as it is.
Closest places that do improv and Toastmasters are both over half an hour away - meaning a whole evening gone.

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Finally; I know the main answer is "get out there and talk to women" - but I'm in a bit of a catch 22 as I have very justified reasons for lacking confidence.