can a primary account and a premium account owned by me share inventory etc

[oliver Bellecoeur]

can i get help here

[Rolig Loon]

Yes, you can get help.  No, you can't share inventory.  Each account is separate, even if two accounts are owned by the same person.  If you have transferable items, you can send them from one account to the other, and you can of course send L$ from one account to the other.  Items that are no-transfer, however, cannot transfer.