BBC is very close to HTML (you just use different brackets), so you're off to a good start.
I did some quick googling and it seems a decision has to be made if you want complete control/host yourself or host on someone else's site. I'll post links below, but I think the biggest issue is you might consider getting at least a laptop if you're going to do this as all of these will be more difficult than it needs to be on a phone.
Free webcomic hosting:
http://mashable.com/2010/10/24/create-your-own-comics/http://cat-nine.net/top-4-best-free-web ... ing-sites/If you want to host yourself, Wordpress with the ComicPress addon seems to be the way to go.
Here's a step by step:
http://www.djcoffman.com/how-to-host-your-own-webcomic/And another that goes into an overall view from start to marketing:
http://www.makeuseof.com/tag/everything ... mics-free/I think the best part of any of these solutions is you don't need a lot of coding knowledge. You can put up something perfectly acceptable with stock choices.
Well, I hope at least one of these helps you get it up and running.