You can do a search for how to make cannabutter or canna oil which should point you in a good direction. Generally, you’ll be extracting cannabinoids from the buds into a fatty butter or oil which will then be used to infuse your food of choice.
If you’re interested in a tincture, search for how to make green dragon tincture. This is generally a bit more dangerous as you’ll be boiling alcohol which has a low flash point but nothing that can’t be done with a good amount of ventilation & some common sense safety precautions.