For women, muscle mass isn't increased significantly through strength training. So trying to build mass to lose weight isn't going to work.
But strength training is good for the body, helps the bones, and preserves the muscle we do have. I am appalled at how much muscle I have lost simply through age.
I think your workout plan is good. If you want more results from weights, you might want to do it only 2 - 3 times a week, increase the weight, and reduce the reps. A trainer at a gym can help you.
To freshen up your cardio, you can add speedwork, intervals or hill work. You can program the machine to do that or do it the old fashioned way on the street.
For me, it is hard to keep building my exercise program. I get lazy and want to do less, but for me to get fitter, I have to keep at it.