hi! choicescript is the most user-friendly, but i believe choice of games owns that platform, so you wouldn't be able to host a full public game with choicescript without submitting it to cog. unfortunately this means they'd take a portion of your earnings, but regardless, i still think this language is great for beginners and messing around. in the long run, however, i wouldn't say this is my recommended language by any means.
personally, i think twine is the best, which is the one i'm using (my ui is coded with html/css). there are links to the "twine grimoire" on my profile which are really helpful for starting out. twine provides a lot more customizability compared to choicescript, especially in terms of design, but it's also a steeper learning curve. if you're interested in this language, there're tons of pre-made templates that wonderful authors have made that you can use. these helped a ton when i was starting out, since you can just copy-paste your text. i also have some linked.
in general, i'd consider choicescript for something more casual and twine if you're a bit more serious. definitely get a feel of both before you get too complicated though. focus on understanding the coding languages first above all before you think about design.
if you have anymore questions, i'd be happy to answer them over email! (evertidings@gmail.com)