Here is the eight answer. Well, and probably the eight opinion

.
You have a very interesting project.
For the kind of work you plan, just taking pictures of yourself with your makeup if I understand you right, it isn´t very important what lens you start out with. Usually the kit lens will work fine. Reason being: in the studio, you can use apertures like 9.0 or 11.0 because the light is made by flash, and decent studio flash produce quite an amount. Using apertures like that will decrease the difference in sharpness between the expensive pro lenses, and the rather cheap kit lenses. They are not exactly the same, but they get relatively close. So especially in the beginning, a cheaper zoom lens will be fine.
Regarding the rest: did you make up your mind yet, what background you´d like to use (white, black, grey, color - would like it evenly lit, or would you like a radial gradient around your head)? That´s pretty important when it comes to lighting.
Many of the things that have been said are totally right. I just want to add two things to what has been said by others:
Regarding the color shift in economy strobe units: absolutely true, BUT: in time your front diffusor (the white piece of cloth on your softbox, or your white umbrella) will get a color shift too (even if you don´t smoke, like me and even if you wash it regularely

). So will your flash bulb. Everything gets more yellow (or "warmer") in time. So the very often discussed color correction for strobes is an issue that is always present, even if you have very decent lights. To me that means: get what you can afford and don´t think about color shift. If you shoot your images RAW rather than jpg and use a greycard to white balance your images in your image editing program, that will work fine, and be pretty consistent.
Regarding focal lengths: don´t get too wide. I wouldn´t recommend a wideangle in the studio, because you will get everying in the frame - including equipment and other objects left and right to your actual background. A good starting point usually is a 50mm focal lengths. And as said, don´t get longer than around 135mm, otherwise you need to have a pretty big studio.
That said: do you have an idea, how big your home studio is going to be (how much available space do you have)?
Also: does the studio have to be teared down after every shooting, or can you leave it as is?
How are you going to focus and press the shutter button? Using the thether software?