Not sure if I should try unicycling. Here are some questions.

Honestly I'm not sure where it came from, but lately I've just had this thought growing in the back of my mind that I should try unicycling.

My mind is almost 99% made up, I just have a few questions.

• I'm 32 and while I'm no sissy, I'm not nearly as fearless as I was 20 years ago. Is this going to be a big disadvantage? Any tips from others who might've started around the same age?
• I'm a tad overweight at the moment, weighing in at 135kg/300lbs. Height is 1.85m/6'2". Am I too much of a fatass for this?
• My choices are quite limited as far as brand and models go because unicycling isn't all that big down here. Based on what I'm willing to spend and the limited options available to me I've narrowed my options down to a Qu-Ax Luxus 24" or 26". Are these good enough for a beginner?