Like @YARNLADY said, your recruiter should be able to supply you with a fairly comprehensive list of what you should encounter while in Basic Training.
When I attended Basic Training for the Army in Fort McClellan, Alabama in 1986, I was one year out of high school and scared too. That 8 weeks of basic training helped me mature a lot, taught me self-respect and self-discipline, got me into excellent physical shape, and made me realize how much I could accomplish through hard work and dedication. I never once considered the ordeal as horrible although it was stressful and difficult at various times.
There are way too many different things we did on a daily basis to cover them all in this answer but suffice it to say, you will be busy from the time they wake you up until they release you for personal time at night. It’s a rigid and demanding schedule but it is beneficial, important, and necessary training for everyone.
We had a very low failure rate in our unit and the Drill Sergeants are not going to let you fail as long as you try your very best and meet the standards set forth by current military regulations. It’s not a cakewalk getting through Basic Training but what is expected of you isn’t unreasonable by any means and if you want it bad enough, you’re going to get through it just fine.
One of the best ways I suggest you start preparing for your military training is through physical fitness. Start working on running, push-ups, and sit-ups because those exercises are items that you will be tested on in physical training tests.