What does your weekly workout plan look like - days, exercises, sets, and reps?
We may be able to tweak things to be even better, depending on what's what, but the fact that you're even lifting at all is obviously a good first step.
And just to be clear, how do you define "some slight improvement"? The weights you're lifting? What you weigh on the scale? How clothes are fitting? Some methods of tracking results are better than others.
Patience and consistency will play a huge part in reaching your goals.
Pardon my french, but that's bullshit.
Your profile says you're 5'6" and 148. Are those recent stats? (People are sometimes "creative" in their profile.) What kind of general shape are you in, honestly - a little muscle and soft, kinda pudgy, genuinely overweight and just starting to change.
Something like Jamie Eason's physique is 100% achievable, eventually, for a woman who decides to align her priorities, focus, training, and nutrition.
Jamie actually did an interview with T-Nation a long while back. Have a look:
Pauline Nordin is a coach and model with a similarly-awesome physique. Check out her interview here:
Notice any similarities in the advice they're both giving?
Try making changes in your nutrition plan gradually, so they eventually become habits, rather than trying to start a whole new and unfamiliar diet plan overnight.
I really like this article as a 28 day step-by-step plan for getting things in order:
Do each step exactly as it suggests, incorporating the next habit every two days, and you'll get there.