Heavy weight lifting for ladies

1. I want to lose around 100 lbs should I wait until I have lost some of the weight with cardio before I start?
2. I'm nervous about being laughed at because chubby girl is trying to life heavy.
3. Am I okay to alternate cardio one day with heavy the next?
4. Do I only concentrate on certain parts of my body at a time?

Thanks for any suggestions.

1. No, don't wait. Strength training, especially heavy lifting, will only help lose weight. You won't really gain muscle while you're dieting to lose weight and lifting at the same time, but it's entirely possible to gain strength and endurance, both these things will help a lot when it comes to meeting different goals later on after you're doing cutting weight (like working on increasing muscle mass.)
It's never too early to begin.

2. Anyone who laughs at you is pathetic, and very few people, if any, will actually do so. Most people will understand that everyone starts somewhere, and will likely only have a higher opinion of you because you're defying the stereotype that girls don't lift heavy. The people that laugh at the idea of a woman lifting heavy are idiots and their opinions don't matter, they're oftentimes the people who also have no idea what they're doing in the gym.

3. There's many different kinds of cardio, but sticking it where you need it isn't that hard. Some people do it at the end of their workout, at the start, or on a totally different day. It's mostly what you're comfortable with. The only thing people will warn you about is doing too much cardio as that could inhibit your ability to build or maintain muscle mass, but that's far more in-depth and in most cases isn't something you have to worry about.

4. In a way, yes. Many people do the three days a week thing. It could look something like this.

Monday - Back/Biceps
Tuesday - Rest
Wednesday - Chest/Shoulders/Triceps
Thursday - Rest
Friday - Legs

But typically people create their own schedule. The reason you work different groups each day is to allow the other muscle groups to recuperate.

There are things like Stronglifts, Starting Strength, and other guidelines for developing a good lifting schedule and workout, and I definitely recommend beginning with those as they will answer a lot of questions and get you a very good foundation, but you'll find that you'll grow out of those and manage to create a regimen that works best for you.

Do it now!! I wish I wouldn't have waited. I haven't seen the scale go down in a while because I am so close to my goal but losing fat I'm able to see the muscles I've been working on.

I've heard that book is like the bible for this, I need to get it.

I don't do too heavy yet. But I do 5 days a week upper/lower/upper/lower/4 day is kinda a mix up or i do anything i didnt work enough and cardio every day just because I enjoy running.

I haven't really found a right or wrong way for this yet. Seems like it differs depending on things like fitness level/goals/bmi. The way I do it might not be the best way, but I'm commited to it and enjoy it.

So my best advice is dont be afraid of the scale. Most of the time it just pisses us off. Take your measurements before you start and you'll be able to see where you are losing and how much. It's a lot easier to see the changes than on the scale.