I had a root canal done last year and my crown put on a few months ago. Having the crown done is SOOOOO much easier than the root canal. My crown was done in 3 appointments but normally it takes one or two. My crown was made too large and didn't fit.
A mould will be made of your teeth to make your crown. That will either be done before your first crown prep or the same day. The moulds take about 20 minutes or so.
In your first appointment you will be numbed and your tooth will be filed down. They do this so that the crown will fit over top. Think if it sort of like a glove for your tooth. It doesn't hurt to have the tooth shaped, you probably will have discomfort after but a little Advil and you'll be fine.
The dentist will either be able to make your crown right that day or will send your moulds off to a lab and they will make the crown. If that is what happens, a temporary crown will be placed. This all takes about an hour or so.
Your next appointment (if you have one) your temp crown will be removed (very easy and painless) and your permanent crown will be fitted. It may feel tight at first it should ease up after a few hours. If it is REALLY tight and sore tell your dentist. If everything feels fine the dentist will put some glue on the inside of your crown to keep it in place. No worries about it coming off, that glue is SUPER strong.
It really is an easy procedure, nothing like a root canal!
I'm sure you'll do fine.