Hello, all these problems will need step by step correction.
First n most important thing is to find out main reason for your acne. Once we treats it, marks will also be under control.
Open pores is ageing change that happens on oily skin. You can opt for CO2 or MNRF treatments after acne n marks are under control to treat the irregularities/scars/open pores on face. It gives good results.
Next Steps
Visit nearby good dermatologist who has all facilities to treat you. Or consult online.
Health Tips
Do not go for quick fixes, its long term problem needs good scientific approach.