Honestly it depends how big the event is, if its a local I don't see much of a problem since your all there to play etc. For larger events it might be a little more complicated as you have people paying a lot of money and travel from afar to attend. Here I would be tempted to say no don't enter and focus on running it until you are comfortable with running tournaments or have a team of players helping you so you can work around each other.
I am a TO for my local scene and I have only not entered once, all the other times I will enter and if an issue arises that I can't play I will DQ myself.
It really does depend on your situation though, if you only have 2-3 hours to get the tournament done and can't afford delays then once again I would likely not enter, but if you've got all day and its a very relaxed environment I wouldn't not enter.
You need to ask yourself, do you have enough time to run it? Do you feel confident you can run it effectively? Do you foresee anything that could cause delays to the tournament because of you entering? and Lastly is there anything else you need to be managing other than the bracket (ie Are you running a Stream, managing overlays, commentating or managing who is commentating etc?).
I hope this gives you a better idea!