Thanks for your kind comments! I think in general, SQLite probably isn't such a good choice for October as there could be any number of plugins that do/don't work with it. I've personally only tested with MySQL.
Switching should be fairly straightforward as long as you can get a
.sql file from your sqlite database. See if you can find a tool similar to
mysqldump for SQLite. Failing that, I'd assume most clients would have some form of export function.
Once you've got the database dump, it's just a matter of importing it into a MySQL database (e.g. using PHPMyAdmin) and updating the db driver in
Hope this helps!