A good place to start I often think is the
Knowledge Base which has some very useful basic information also the search here is very good that will often point you in the right direction.
You mention dreamweaver which is a WYSIWYG editor of sorts, there are lots of topics on the subject here. Imo you should steer clear of it as it is/was well known to add nonsense to the code and also messed up tabbing. For anything related to phpBB and PHP itself you need a good plain text editor such as
Notepad++ which is free and very good (
NOT MS Notepad). The only drawback is you need to learn how to edit code but generally there should be no need for you to be editing files.
You mention an automated database backup issue. There is no automated database backup within vanilla phpBB so I can only assume it’s either something your host is doing or, most likely, it’s an extension that is out of date or incorrectly setup. If you can give us a list of the extensions you have installed we should be able to nail that one down. An easy way to do that is to go to the ACP> Customise tab, which should take you to the Extensions Manager, and there will be a list of any extensions you have installed. Take a screen capture of that page and post it back here. Posting a couple of the error messages you’re seeing will help too.
Also, if you’re having issues and come here for help it’s always a good idea to fill out the
Support Request Template filling in as much information as possible and posting it back here to enable us to assist you better.
Good luck!