If you can find food grade 190 proof (95% etoh) grain alcohol, just drop some sativa in and shake every day for two or three weeks. Strain and enjoy... I use Everclear.
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https://www.leafly.com/news/cannabis-101/cannabis-tinctures-101-what-are-they-how-to-make-them-and-how-to

Do you need to freeze it or anything? So you put the Everclear say in a mason jar and drop in some buds, do you know what how many do you need?Now I’m getting interested in trying it. My dispensary has some really nice strains. I would love to smoke but I had thoracic surgery last year and I’m trying not to.

So I used Everclear 151. Works for me!
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Cover about an inch over weed with Everclear - in freezer for 5 days stirring once a day - then strain thru cheesecloth and keep in your kitchen cabinet.

Good for making gummies. I use 4 teaspoons of extract to 1 1/2 cups of fruit juice, unflavored gelatin and honey.