You seem fine to me. You'll find a lot of people on Furtopia in favor of desktops contrary to the popular mindset of today, but in all honesty a computer is a computer. If you want a desktop, get a desktop. Same with laptops. Each have their own advantages and disadvantages.
Like Weisseman said, having a landline is fine. Maybe you can make a Skype account and slowly transition to that from YIM (I personally don't know anyone that uses YIM...but a lot of your friends still do, so perhaps just keep two chat clients open). I don't know if there is a way to consolidate your chat accounts into one program easily. As far as wireless goes, Weisseman is right. Security isn't really an issue, and if you really want to be sure, then have WPS disabled and a good WPA2 password.
But I didn't really understand what you wanted from your post.
I mean, you said you were a simple guy with simple needs. I have a lot of friends who don't have smartphones, and I have no problem keeping in contact with them.
You are also consistently on the Internet, so that's not much of a problem (in terms of keeping in contact with online people). Really, communication of the future is essentially the communication of five/ten years ago...the only difference is now we have many novel and egotistical ways to entertain ourselves, and sometimes that is disguised as communication.