Thank you , do you hv any tips on oxidation or stochiometry

you can try memorising the various acronyms that differentiate between oxidation and reduction. For instance, I use
Oxidation Reduction
State + -
Hydrogen - +
Oxygen + -
Electron - +

Using that, you can easily differentiate what happens.

For stoichiometry wise, I advise memorising the key formulas and practicing more. Start with simple practices then move on to mole ratio kind and slowly build up your foundations!

oh ok thank you sm!