Help me build a pc

Ok so I want to build a gaming pc. I am mentioning few components which i need. Please recommend me the other components which is required to handle my mentioned components and in budget way I7 (suggest me which gen is better for gaming) 8GB RAM ( I can upgrade more later according to budget) 500GB SSD (Enough for me because i own external SSDs Rtx 3060 (12GB)

Please suggest motherboard , cabinet , psu and cpu cooler and other components to run the above components.