What you want is a beta reader. When you've been around a little longer and gotten yourself up to 50 posts, you can make a thread in the Beta Reader subforum seeking interested parties.
The best way to get a beta, though, is to make friends with other writers. Meet people around here whose ideas mesh with yours, who you get along with and can talk with easily, who read and write your genre, who are in the same place with their novel and publishing journey as you are, and when you feel comfortable with them, ask if they want to do a swap. Doing beta reading yourself is a great way to learn how to edit and see things that you might need to look for in your own work. You can earn your 50 posts, meet people, and get some critique practice in in the Share Your Work subforum.
As for how to actually get your book to people, email. When you get a beta reader, ask their preference. Some people like .doc or .rtf, some people like to use Google Docs, and I've even seen people want PDFs. All beta readers have their own style. Just ask which one yours is.