TITLE: Self-learning Calculus. Where does Lang's First Course in Calculus stay when compared to Apostol/Spivak/Courant
QUESTION [12 upvotes]: I need Calculus book that suits my level. (Or at least primary book which I will follow more closely)
I don't have much formal education but have recently read Lang's Basic Mathematics (cover to cover, doing all almost all of the exercises).   
In my search for books I found:
Spivak - Calculus
Apostol - Calculus 1 and 2
Courant - Introduction to Calculus and Analysis vol 1 and 2
Lang - First Course in Calculus   
I found info about the other books, and it seems that Apostol's Calculus will be best suited for self learner and covers more than Spivak (also gives some applications), while Courant covers even more than Apostol but has less and harder problems.
I have read a little bit (about derivatives, limits) of Lang's book and it's quite easy to follow.
So, where Lang's book stays? Are the other books too advanced for me? 
Which book I should use as primary text if time is a concern and I want to cover more things? (Sorry if that's too many questions)  
Thanks.
EDIT: 
There is a thing in the college I want to go called "Mathematics and Informatics" (that's in Eastern Europe).
I'm kind of in hurry because I want to get in college and I have the chance  to skip the first year if I know enough. (first year is mostly C++, Calculus and little bit of Linear Algebra and I already know enough C++)       
So if I'm to skip the first year I should be ready for the Mathematical Optimization, Discrete Math, Differential Equations, Information theory (IDK if I translate correctly). All of these are intro level.     
I have around 6-7 months before I try to get the exams. And little bit more before I eventually start college.   
BTW, Basic Mathematics was quite challenging and there have been some exercises that got me to look at the back of the book for solutions or search on the internet. Don't wanna make it sound like I've done 100% of them (someone in my situation my get discouraged after reading this), but I tried.

REPLY [7 votes]: I have a similar background most of my math has also been self studied. In fact I also started by reading Serge Lang's Basic Mathematics. This gives a great foundation and gives you a lot of nitty gritty stuff that will help you prove things later! If you can handle that book I definitely think you'll be fine reading his calculus book (I also read that book after reading Basic Mathematics).
Being a fellow self studier I highly recommend that you look at MIT open courseware. MIT posts top quality courses with lecture videos, problem sets, exams, and solutions 100% for free online. Sometimes learning straight out of the book can be difficult and this will be very helpful!
Here is the calculus course
Here is the discrete math course
Watching these lectures with the book will definitely help you prepare for the exam. In addition I highly recommend 3B1B's animated short videos that help visualize the concepts from calculus they are amazing!
3B1B videos
Good Luck!