Accepted a job, but now realize I don't think that I will like it. What should I do?

I accepted a position for a full time data entry job, and after practicing all this weekend doing it; I don't think that I will like it.

I've been doing 10-key data entry tests online, and after just doing them for 5 minutes, I'm already bored, and it feel like torture.

Both my current part time and new job pay about the same ($14), but my current job is pretty laid back since my boss trusts me to work on my own. Problem is that's its only part time work.

If I don't like this new line of work before it even starts, It's not going to get better right?

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