I don't even know what to think anymore....

I just don't know what to think and what to say anymore. I'm just feeling so down, and everything just seem so dark to me. Ever since I picked the task as a leader of a team, I took it because I want to challenge myself that I can do it. But, until now, I might as well as regret it. Because this is the first time I took this task, it is obvious that I have no experience whatsover and I'm trying to learn from my friends who had the experiences. One even went as far as controlling everything even though I didn't ask her to do so. I felt really bad about it, and according to my other friends, apparently she didn't like me as a leader. I already agreed on stepping down, but I don't know. I just feel so very guilty on what I did. I appreciate her hardwork, and I told her that I will take over so she didn't have to do it. But somehow, deep down i felt so useless and too dependent, even though I didn't mean it. Whenever I think about it, I just feel so depressed and bad mood overcomes me. Immediately I just can't be optimistic for the rest of the day.
I know this might seems weird, but if there's anyone out there who are willing to give any advice on what should I do, then please do. I just want this burden to be solved ASAP but I don't know how

Hey AnnaEphe first I would like to applaud you for taking the risk to challenge yourself. Not many people can do that and prefer to play it safe. We, as people, are always striving for more but we can't do everything let alone please everyone.

You tried to take charge but hit a bump in the road. We will all be in the same situation as you at some point in our lives, but at least you tried and didn't give up because you tried to maintain leadership and control. Now that you are in the sidelines, take time to learn and observe so that next time that you become a team leader, you'll make a huge and fantastic comeback as I know you will. You will have the proper skills, wisdom and experience by the power of observation and asking questions. Don't beat yourself up for this! Instead see this as a brand new opportunity of knowledge! Good luck to you and chin up!