iSeries Navigator has been superseded... may work, but if you're running Windows 10 it is not supported.
There's a new Java based client, Access Client Solutions (ACS) that gets you 5250 emulation and some DB stuff.
However, most the admin stuff has been moved to IBM Navigator for i which is a web based server application. You should be able to access it via http://myibmi:2001
Documentation for the IBM i is here: https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_72/rzahg/ic-homepage.htm
EDIT
As far as analytics or visualizing the data. You can use SQL to access data on Db2 for i just like any other RDBMS. ODBC, ADO, .NET, and JDBC drivers are available. ACS includes a "Run SQL Scripts" component or you can use any number of open source tools.
Analytics are not a function of the platform, they are a function of the software package you're using. If you were running SAP on i, you've have the same SAP provided analytics you're used to. If your package doesn't have any, then you can build some in whatever you'd want.
IBM Watson Analytics now has a built in connector for Db2 for i.
https://www.itjungle.com/2017/06/14/new-data-connection-ibm-watson-analytics/