I have been a failure (over and over) and I used to allow the devil to create fear and doubt in my mind- which gave me a distorted, untrue, unrealistic view of what God wanted from me and made full committment a scare. Little by little he lead me out of my ability to be a full-fledged Christian...
Don't expect failure... expect that you ARE the righteousness of Christ!

The best way, I believe, to avoid being lead astray, is to learn what the Bible says you are in Christ and to cast out evil thoughts of fear and doubt. This may seem extreme or wild to some people, but for the first few weeks of studying... I would cast out every negative thought (rebuking my own, personal issues, and the devil's lies- even if I didn't know where they came from)... then, I'd sit and focus on God- and I wouldn't dwell on anything or try to fix it-- God can ease your mind! He will help you succeed! '
The advice everyone is giving you will be helpful... STAY IN THE WORD!! I found these books and they have helped me:
The Bible-(imagine that! haha) I love the Life Application Study Bible!
The Release of The Spirit- Watchman Nee
The Purpose Driven Life- Rick Warren
I also keep, in my house and car...
Joyce Meyer CD's... Creflo Dollar...
They can all be helpful, but seek your own revelations and direction through the Holy Spirit and through the Bible and fellowship with other Christians! The Holy Spirit will confirm to you what is right and True.
Congrats to everyone who is getting baptised! May God bless you all with strength and endurance! Don't be afraid of making a mistake, just get back up knowing that God is ready to dust you off and move you to a new level when you get back!