Advice on my workout routine?

I'm starting to ramp my workout routine back up after a 6 month semi-lull. I wouldn't mind losing a couple pounds I've gained over this time (currently at age 35, 5'5'' and 122 pounds, small frame) but my primary goals are to improve strength, endurance, and general fitness, and to feel really good emotionally and physically.

I have never liked weight lifting but I know that I am fairly weak and really want to improve my strength. I ordered the book NROLW and hope to receive that very soon. I do not have access to a gym, so I'm hoping to buy a barbell set. I've seen some advertised that are 100 pounds- is this enough? I'm quite weak now but want to keep working on that, and I'm just not sure this is enough. Also, I'm hoping to limit weight lifting days to twice per week. Not sure what NROLW will say about that- but do you think I can make appropriate strength gains with only 2 lifting days?

My other workouts are as follows:

2  days of 2 1/2 mile runs (I run for a bit, then do exercises such as push ups, jumping jacks, squats, etc, then run for a bit, repeat, to keep the intensity of the run up).

1 day of Insanity (high intensity cardio, basically).

1 day longer run (working up to 4-5 miles).

I'm hesitant to replace a cardio day with another weight day because, well, I love cardio and I feel like it's been really effective for me in managing mild depression and anxiety that I struggle with. But I'm open to suggestions!

TIA with any advice you might have!

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