I used to get really sore knees and calf's so I went to a guy who helped me setup the bike. I had the saddle way too low so wasn't getting enough leg extension which was causing it all. Do you have any mates who are keen cyclists and can help set it up?
Generally cycling is fine if your bike is set up correctly and your not over doing it.
I would check your saddle height, AFAIK you should be just an inch or two less than full stretch at the bottom of the pedal.
Like this![]()
I am prepared to be proved wrong![]()
What type of pedals are you using?. Incorrect adjustment of SPD type pedals or the cleats can cause issues with knee joints.