Need some advice please. My almost one year old daughter has started having tantrums, screaming,…

Need some advice please. My almost one year old daughter has started having tantrums, screaming, arching etc big time. Didn't think at this age she would. Mainly at bedtime but also when she doesn't get what she wants, I'm changing her or I'm busy and partners at work so I can't hold her all day. Also sometimes she just wants me and will cry till she gets me. She has started crying whenever her grandparents want to hold her cos they're not me or when I go out the room and leave her with them. They see her regularly.

She usually naps on and off when I'm trying to feed her solids through the day and it takes forever to get her to sleep at night as it is without these tantrums on top. She's been worse since a couple nights ago when she was up sick and hot early morning

Also interested in teaching her baby signinging assuming its not too late? I got no idea how too start and haven't any extra time to put aside to do this. I need it explained really simply