Overboard

I jumped into the swim today with both feet. I have been reading so many blogs and have become so enervated. One of the local knitting stores has a sock class starting Tuesday, so I signed up and bought some lovely yarn. It has to be knitted on size 1 dble oints which has me a little fearful. It has been a long time since I used ones. My children are 39 and 41!!
Then one of the children of a friend fell in love with a hat she saw in a book , "TOO CUTE" by Debby Ware. The patterns are all in Tahki Cotton CLassic and the colors are just yummy. So I bought that yarn and cast on to start. The color changes are a fair isle style?? and I have never done that, so I really have picked up some different challenges. I was strict;y an afghan and scarf knitter until a few days ago.
I am awaiting a knee replacement on April 20, so I also picked up the "100 by Aprril 1" and I will do mine on my recumbent Bicycle. I am recovering from arthroscopic surgery on the same knee (that did not correct the problem) so the exercise will do me good. Can you knit and bikde at the same time???