If you want to learn yourself for SAP S/4HANA Finance, you may go for SAP FICO course first as this will demonstrate end to end configuration and related End-User business processes.
Once you finish SAP FICO course, then you can join the SAP S/4HANA Finance as this course will demonstrate the changes in the configuration and end-user processes which SAP S/4HANA Finance brought as compared to the traditional SAP ECC FICO.
If you want to know about SAP HANA database and SAP Fiori as new User interface which come with SAP S/4 Business Suite, then you can join the following course:
These courses will prepare you to learn and understand the functional knowledge on SAP HANA, S/4HANA, S/4HANA Finance and SAP FIORI which is necessary to pass the certification exam and job interviews.
Please go through the training contents before purchasing the courses.