IMHO you will not find the correct mode of worship practiced solely by any one denomination. You will have to look at individual churches.

The regulative principle is about as pure as it gets. Of course, singing the Psalms and other Scripture is scriptural. IMHO there is other music (within the parameters of Scripture) that is correct as well (i.e. some of the great hymns). A book I would recommend is “Give Praise to God,” edited by Philip Ryken. While it contains many articles concerning worship by Presbyterians (J. Ligon Duncan, Edmond Clowney, Hughe Oliphant Old, etc.) it also incorporates some Baptists as well (Mark Dever, Al Mohler, etc.). The book is actually celebrating the legacy of James Montgomery Boice and its forward is by R.C. Sproul. Another book to consider would be “With Reverence and Awe,” by D.G. Hart and John Muether. I know John personally and he indeed practices what is subscribed to in this work.

While no one book will IMHO answer all your questions they will most necessarily lay the foundation for you to see the truth of Scripture regarding worship.

Reformed and Always Reforming,