Couple ?'s

So the store where I bought my first brew kit told me to leave the brew in the primary for 3 weeks then I could bottle. Is this ok to do or do I need to leave longer? It is an IPA. Next When I transfer to bottling bucket do I put the auto siphone down next to trub or just above it and get as much as I can without the trub? Then when I bottle how much room should I leave in the bottle for air space? Finally when can I drink my first home brew? Wish I could drink it now it looks awesome in carboy and smells amazing! Can't wait to start another! Thanks a lot for responses, greatly appreciated!

Do you have a hydrometer? If so take a few readings over 2-3 days to make sure fermentation is complete. Your readings should be the same if it's complete. If not, 3 weeks is minimum IMO. You could even go an extra week if you want.

Avoid picking up the trub. You'll have to leave some liquid behind.

If you have a bottling wand, fill it until the bottle is completely full. When you pull out the bottling wand it will leave just enough space (about 1/2") in the bottle, then cap.

After you add your sugar, fill your bottles, and cap put them in a warm (~70F) place for at least 3 weeks. I'd wait even longer. They should be ready to drink, but test a few before you put them all in the fridge.

Three weeks is pretty good. Your hydrometer readings will actually tell you when fermenting is done. Add a week or two beyond that for the yeast to clean up off flavors. If you don't want trub in your bottles, keep the siphon just above the trub. Two days before bottling tilt your carboy or bucket. This will maximize the amount of beer siphoned. Use a bottling wand and the proper headspace in the bottle is automatic.

I like to let it bottle condition for a couple weeks at the same temperature I fermented at. Then throw it in the fridge for at least a week before you start drinking it.
my .02

If you are going to move the primary before you rack, let the beer settle for awhile before you rack. I like to put something under the primary to tilt it slightly to get a little more beer. Leave the trub behind. 1+ on bottling wand suggestion above. They cost approx $3 and are helpful. Others on site suggest bottling over an open dishwasher. It helps minimize mess.

All good info; however, I would encourage you to chill after one week and taste then two weeks, etc. It helps you learn how the beer changes week to week and curb your impatience.

Thanks a lot for the advice! You all are the best!