Thanks @edanya! I think for this sort of art as I mentioned above with @veryspider, the main way to learn is just mileage(doing it a lot) and also seeing someone who's good at it doing it. I'll share some youtube channels for you to check out :)

https://www.youtube.com/channel/UC7nqKTkW-PUmcTk_vp2yvtQ
https://www.youtube.com/channel/UCliUF1c8m7MUspaCykJljSg
https://www.youtube.com/channel/UCB9berO64_friwLRsKQ9fag