I need new hobbies

I sew or knit - most guys aren't into that. DH plays guitar. Learn an instrument? Read? Is there something you've thought about trying? I've taken various types of craft classes. Didn't like them all as ongoing hobbies, but had fun during the classes. You might meet some new people too. Learn beer brewing? That's a lot of wait-and-see, but fun. Are you a fly fisherman? You could tie flies. Volunteer?

I was going to say go visit strip clubs, but, I don't think you want to throw out your money.

One of the most relaxing things is probably getting into reading.  Are there bookclubs around near you?

Find a topic, like electricity/being an electrician, and then surf the Internet and educate yourself?

Golf.  Ride a cart and all you have to do is swing the club.  You'll meet new people, because normally you can't golf alone, especially on the weekends.  The clubhouse is going to place you with another group that is short one or two golfers.

It's a very mentally demanding sport, and can be as physically demanding as you make it.  Seriously, look at all the senior citizens that still have fun playing golf.  Which brings up another good thing about golf: even when your Ironman days are over, you can relive the glory days over a beer with your buddies after 18 holes.

Here are my non-sport hobbies (past and current): reading, movies, quilting, knitting,cooking, photography, sewing, woodworking, stained glass, piano, guitar, painting, gardening. When I was in college, I used to paint lead miniatures as well, and I had a cousin who was into model trains.

I can't imagine being bored in life, or needing to find something to do. I am always up to try anything.

Kayak, fish, snorkel, they can all be done in a relaxed manner.