I have faced many problems while completing the Next JS lessons , So I have created this repository which has a commit of every lesson
I know most of you will not have a problem until lesson 5, The only problem might be lesson 6, I initially gave up on that too and started to setup a local database using prisma and sqlite
If you are unable to move past lesson 6 use the file SQL_Script.sql 
and paste it in run query mode in vercel postgres instance, This will create a database with manual code and you can skip lesson 6 and move to the next one if this doesn't work and you still have problem I would suggest to delete that postgres instance completely and create a new one as your previous queries and uploads might cause conflicts
Notes :
- Skipped lesson 10 because when I add that it is showing you should have latest next js version besides the documentation itself stating that it is still in experimental stage so I don't want to worry about that topic right now as most of the features are already working fine so skipping that lesson 10
- In lesson 11 the debounce method is not working for me because of react js version mis-match
- In lesson 13 uncomment this line " throw new Error("Failed to Delete Invoice"); " in "app/lib/actions.ts" and run it like it shows how error is shown
- Skipping lesson 14 cause it is only of improving accessability so I think I cannot spend more time on it now
- Lesson 15 this authentications works differently in production and local so check that once while uploading it in production
- lesson 16 since metadata is a straight forward lesson I am skipping that too