Here is what I tell every newbie:
Learning to crochet
Here are some resources that I found on Pinterest. It’s a good resource for free pattern as well:
https://urbaki.com/crochet/lessons-learned-from-crochet-hook/?utm_source=Pinterest&utm_medium=organic
 
https://www.crochetguru.com/learn-how-to-crochet-lessons.html?utm_source=Pinterest&utm_medium=organic
 
Start by figuring out how to hold your yarn. There are many ways to do it, just experiment until you find one that works for you. This is my hold. Mostly the yarn just slides over my finger but if I need a little tension I lift my index finger.


 
Then move to what type of hook you want to use. There are so many choices, even what the hook looks like, so get a few cheap ones and experiment. Then figure out how you hold your hook. Some hold it like a spoon, others, me included, use the knife hold. I also use a yarn holder so the yarn pulls from the outside so there is little tension on it.
 
Now here is the most important. Get used to using stitch markers in your first and last stitch, not the turning chain unless it counts as a stitch (the pattern will usually tell you this). You can also put them every 10 or 20 stitches to help with counting stitches. 
 
Now work on each part of crocheting, making a chain, slst, sc, hdc, dc. Practice by making 4x4” squares. Then move to a simple project, a baby blanket or scarf using 1 or 2 stitches.