I have created a few pdf files for kindle. I use Open Office which has a direct export to pdf. To make pdf files readable on the kindle you need to use a fairly large font. I found 20pt to be about right for me. A bit of trial and error is needed. But it works well. Don't force page throws, though as the original document pages and Kindle pages do not coincide and kindle seems to treat the document as one long page.

It is also very useful to create an index at the front of your file as the kindle does have a "go to" facility (Menu > Go To) and with pdf it will take you to the page of the original file.

I created my own song book using Open Office Writer and it works quite well, though I do not carry my kindle about all the time. The songs have dots for the tune which I create by exporting an image file from Noteworthy and importing to Open Office. You could also put the tune in abc format.

Open Office is a free download, btw, and is as good as MS Office for almost everything, certainly for everything I need it for. However if you are thinking of trying it, I recommend you go for Libre Office which is essentially a rebranded version of Open Office and it looks as if that is what will be developed further in future and Open Office itself may languish.