Understand the basic knowledge of finance (at least write accounting entries), not too deep. Of course, it would be better if you majored in accounting.

To understand the business, it is necessary to understand the invoicing in the enterprise.

Practice more operations in the process of learning, without logical thinking, but understand what the main fields in the background and foreground mean.

Just repeat the exercise.

Band Width

Knowledge of database or programming is better, and you can learn without it.

Keep practicing.

Learn ABAP knowledge. There are quite a few places where ABAP is used in BW.

The employment prospects are not as good as FICO at present, and there may be more in the future.