Big congratulations! Doesn't it feel great to accomplish something? When I was in my early 20s I had 4 knee operations and did not have the best rehab but finally met the man of my dreams who got me on a bike. The 1st ride was like yours and I burst into tears. I was so happy! I was used to be very active but the knee operations ended my sports (volleyball, tennis and backpacking) so I was thrilled to find something I could do. The rest is history and a nice collection of fine velocipides.