Hi,
Hope you are doing well.
- As far as I understand, you have installed the MSFT 365 BC On premise solution? If not try installing the On-Premise.
- Next step is to have visual studio code with AL language extension installed, which I suppose you already have.
- Press, Alt + A then Alt + L to create a new AL Project.
- Now, It will ask you, either you want to connect to your cloud version of BC or Local.
- Click on local.
- Make sure that webclient for Business center is running
- Your launch.json file would looks like this:

- Press Ctrl + Shift + P and type or select AL: Download symbols.

- On Success, Again Press Ctrl + Shift + P and type or select AL: Publish

- Now do some development using AL language in .al type file(s)
Every time you need to deploy a new package, just publish.
I guess this is what you was asking for?
Let me know if you need any more help. Thanks