Best advice I can give is to just start reading posts and commenting where you want. Not to hard to get started. I would also help if you could tell us a little about yourself.
Welcome, both @Mersha and @Disgustedman! This is a great group of people!
You can start by checking "What's new" at the top left. Or if you want a specific topic, use the search button on the top right.
We are an international group (England, Australia, United States). So make yourselves comfortable and enjoy!
If you need help, when you are on the main Senior Forums page with all the discussion categories, scroll all the way down to the Community section where you will find the category Forum Support and Suggestions, in which you can post your questions and read others' questions and answers, which might be helpful. And as @Alligatorob suggested, just jump right in. It may take awhile to get acclimated, so don't get discouraged if it does. I hope you enjoy the forum as much as I do.