Need help working out lifting stuff <_>

I'm a 5"1 female, I've been working out for about a year now and lost 10 or so kilos from 65kg. The lowest I was at was 55kg at one point but I was still flabby so I did the 30DS, also joined the gym and attended combat and pump classes. I gained some muscle weight and noticed some definition in my arms and legs. During December I went to Japan and came back out of shape. :P

Currently I still work out 5-6 days a week, alternating between pump, combat (usually 2 classes each) or doing the Ripped in 30 DVD on days I cannot make it to a class. I don't eat a lot of processed or packaged foods except when Aunt Irma visits but I pick myself up again and reset after regaining my sanity. Anyway, I don't seem to be seeing much results these few months so I'm pretty sure I'm doing too much cardio or my diet is total crap. I track most of my days usually eating around the 1500cal range and they outweigh the bad....so I am at a loss.

So I want to start a strict lifting plan, but I have no idea how much weight to start off with. I've already done a lot of body pump and worked my way up to these weights for the tracks.

Squats: 27.5kg
Chest: 15kg
Back: 15kg
Tricep: 10kg
Bicep: 10kg
Lunges: 15kg
Shoulders: 2.5kg dumbbell and 10kg bar

So if I can do these weights and recover quite quickly, how much should I raise it as a beginner? I'm also thinking of following this meal guide I found on BodyBuilding.com. Randomly punching it in MyFitnessPal (since it doesn't state serving sizes) gives me 2000cals+. I was thinking of adjusting it to 1800cal.

http://www.bodybuilding.com/fun/go-from-zero-to-hero-in-one-year.htm

Advice is much appreciated!