ACT, SAT, TOEFL or IELTS with IB???

I have no money, buttt I saw many unis in the US provide scholarships. I dont even think its possible for me to get into them but i want to at least try… Many unis require the SAT or ACT and so on so i just wanted to know if anyone was preparing for the IB examinations with the SAT or others at the same time?? And if yes how difficult was it, what tips do you have ??🙏🏻🙏🏻😭😭 thank you in advance