The White Rose questions are tricky. If you watch the video, that will help a lot but if it is too hard, don't worry. I've also attached a PDF called "Twinkl fraction problems," which is not quite as hard. You can choose either or bits of both and please don't worry if you don't complete either - just do your best!
Alternatively, you could pick a few of the "challenge cards" to have a go at. You could have a quick look at all three PDFs to decide which is best for you.