That knowledge will make finishing the second book much easier. As you write more books, you'll find that you develop a rhythm to your writing. You'll begin to notice how long your chapters are, how many scenes are usually in a chapter, how long it takes you to write a scene or chapter, etc. This knowledge will prove invaluable once you start writing to deadline. Make time to read at least one book a month.
Most writers start as avid readers.
Once readers start to write, they sometimes find their lives so busy that reading is neglected. Don't let that happen to you. Don't lose your love and appreciation of good stories. In addition to hours of pleasure, reading will keep you up to date on the market. Rejoice in the success of other writers.