Are you new to computer world and did you looking for solution for type in sinhala and edit images using sinhala fonts, in any computer you can just install sinhala or tamil or any other type font in to your system font folder and you can start using that font immediately but if the language comes with complex combinations of characters it will go far then just typing a letter by using key stork of key board,
This problem comes with the sinhala language too because it has complex combination of the characters as a example ක්රේ this single characters is not the one of its own parts but its a collection of "ෙ" "්ර" "ක" "්"these 4 symbols together ,in this case you cant simply instal font and use it for complex characters , you need to instal character binder software for type these letters correctly in the document.
keyman Helabasa 6-0-164-0 is a this kind a software that can make your typing correct, the process of correcting these font is another story and il will tel you that later, for now if you have any problem with typing sinhala without massing with Ispili and Papili you better download and install this software.
click on above link in the document page go to File => Download and unzip the package and run Helabasa.exe