So you went and read the page for the exam on Microsoft Learning https://www.microsoft.com/learning/en-us/exam-70-461.aspx. You can find a section called Preparation Options whoch include a variety of ways to prepare.

Additional to that, you could look for other books on SQL Server and T-SQL. You can read some of the Stairways in this site. And you really should get yourself a copy of SQL Server, either the Developer Edition (complete suite at very low price) or the Express Edition with advanced tools (completely free with limited options/features) which might suffice for this exam.

Try to understand the basic concepts of relational databases and everything will become easier.