Perhaps this isn't the correct forum, but quick question.

For 2 months I've been doing 50 minutes of cardio M-F at 6AM before breakfast, before work. So far I've lost about 12 lbs, but most importantly my energy level and focus throughout the working day is vastly improved.

I would like to incorporate strength/weight training into my routine. What would be the best way to go about this? Do I have to stop doing the cardio? Can I do both (as I would prefer to)? Can you point me to some good routines to get started? I posted on /r/fitness but didn't really get any valuable responses.