Hello, and welcome to Knight Realms!
Before we can answer your questions, I need to ask you to read the Forum Rules at the top of the page - everyone who posts is required to follow them. Please take a moment to read them, and add your name to your signature.
Age limits are discussed in the Rulebook, under "Policies and Statements."
The next event is listed under "Calendar of Events" on these forums. You might also want to read the post "Dates for Winter" under the Straight Talk forums.
Most of your questions will be answered already on the website - we've spent a lot of time trying to make sure it's easy to find and everything is listed, so you don't have to ask lots of questions.
Take a look around, read the Rulebook, and read the Forums, and you should find almost every thing you're looking for.