@Ken Mcfadden - welcome to the forum Ken. As stated, you need an
@Admin to change your user name. If you use the "@" symbol, in front of someone's user name, as I did with yours and an admin, it will signal that person that there is a notification for them.
As far as navigating the forum, you will see the index at the top of the page (depends on the platform you are using). One of the index items is "Forums". Clicking on that heading will present a list of sub-forums. You can select the sub-forum that is appropriate to your post. At the top of each sub-forum is the option to start a new thread. Click on that, enter a thread title and then type your question/comments in the box that is visible.
There is a sub-forum called "Forum Support/ Site Help and Suggestions" - this may guide you through the forum usage, but if you have any specific questions, please ask and one of the members will certainly attempt to answer your questions. See the attached image for the location of the items I've referred to.
So, having said that, is there a specific question you have regarding your new router?
Site Help and Suggestions - Router Forums