You are in the right time to look for another Job. As you just started; it will be easy for them and you find the best fit for both. At least you have the chance to picture in real live how it would be your Job if you decide to stay.

Start looking for another job, OP, and make your boundaries clear and strong in your new job.

You agreed to all these tasks at this rate, right? So you have nothing to complain about.

If they're adding on the tasks and they aren't in your contract either say "I'll do them if you pay me more" or "I can't do all these things at the same time, which are your priorities?"

Give them notice. It’s not a match and now you know you don’t want a job that will include these things in the future.

Did you know what you would be doing and what you would be making ahead of time?

Get out!

I am person who can’t say NO.
I just started with family part time . They were very nice during conversation.
It’s three days I started. They expect me to do a lot .
Today , I told them they are not offering me huge amount and this is lots of tasks .
Picking up two children, spend time with them , groceries, cooking , light housekeeping.
Now I feel guilty why I said to them? It was killing me from inside .
They family act very nice so I am guilty
Have someone experienced that?
Thanks