Re: Clicking on forum topics brings me to my main website
If your server supports mod_rewrite and .htaccess, you can make pretty permalinks work (if they work for WordPress, they can work for bbPress). You just need to follow the instructions.
And if bbPress is in a sub-directory of WordPress (collectibles-talk), then you will have two .htaccess files, or possibly all the rules in the WordPress-level .htaccess. The .htaccess you posted is the default WordPress one. You need more rules for bbPress.
Here is something about that: