1) Word Perfect is an old and non universal Office Program. It will do what you want but may not allow you to share with people using MS Office (an expensive program). But there is an alternative (which just happens to be free too) which is called Open Office and can be downloaded from here:
Get someone to help with downloading and Installing Open Office. Be prepared to supply them with lots of tea or coffee as this could take a while.
When installed, adjust the default Save As feature (under Options) as MS Office 2000/XP which will allow you to share your documents with everyone. Do not select to save as Office 2007 as this is not a Universal format and can only be read by MS Office 2007 users.
2) You will need several books to learn how to use a computer (but you don't have to know everything!).
Learn only what you need to know to do the job at hand, and then gradually expand your knowledge as you learn to do new things or the same things in a different speedier way.
Start with something from the Library - try "Computers for Dummies" or "(insert the name of your Operating system here - eg 98, 2000, XP) for Dummies". Try to get hold of something like "(Microsoft) Office for Dummies" which will guide you through most of the Open Office stuff (even though things are called different names) - there may even be books on Open Office for beginners by now it has been out for a number of years - though you may have to pay for this, as a Library is unlikely to possess it [and you will want it by your side for frequent future reference until your become competent on the computer]).
Try to get some help and advice from friends on points you don't understand (don't forget to ask their kids for help).
Computers are not hard to pick up skills on, just be patient and be willing to ask people if they know how to do this or that. Soon you may find those same people coming to you to ask for your help (this actually happened to me when I was learning Excel).