
Welcome to the forums, Becca!
From what you've said, my first thought is.. "She's overdoing it." I'm a beginner when it comes to weight training myself, I've only been working the iron for about a year. But this is based on what I have learned. Others will be able to give more advice or go into more detail on how it all works.
Firstly, I don't think 1500 calories a day is enough. Porridge, vegetables and chicken are fine in a diet, but should not be your sole energy intake! You'll be missing out on your EFA, (which are not called essential fatty acids for nothing!) and many other nutrients. These EFA's help body cell function and metabolism to help you burn more energy. Variety is so important when it comes to diet.
Secondly, don't do so much cardio before a weight training session. Keep it low intensity and steady for 10 minutes, to warm your body and bring up a light sweat. Stretching is also vital, and should be incorporated into the warm up and cool down. After your weight session about 30mins of HIIT.
To begin with weight training, find yourself a beginners workout.
12 Week Beginners Training Routine - Muscle & Strength
This one is perfect. It's the one I started on and I acheived fantastic results from it. Once you've completed the course you can move into more intense routines.
Just remember though, that with weight training you won't lose weight. You will build muscle which weighs three times more than fat. Once you start you should monitor your bodyfat % in conjunction with weight in order to gauge your progress. More muscles means more calories burnt, which means the more fat you will use.
Low intensity cardio is also good for weight lifters, as there is less of a chance of your body cannibilising your muscle for energy. Low intensity will burn more fat although it takes longer than HIIT.
I hope this has helped, and I know the other girls will be able to offer more. Good luck with your goals and how about starting a training journal to keep us posted on how you go?