Second Month In

I have been doing my new exercises of weight training, crunches, and walking for two months. I am now using 5 lb dumbbells to do 4 sets of ten triceps kickbacks, 4 sets of ten shoulder presses, and 3 sets of ten bicep curls. Then I use 8 lb dumbbells to do 1 set of ten bicep curls. Then I do forty push ups. I do this routine three days a week. Two days a week I do 100 crunches in sets of ten or twenty. Then on Saturday I have been walking a little over four miles in around an hour and twenty minuets. I want to be doing twice this in a month or two.