Playing with technology

I spent many hours writing a story on my Android tablet, only to discover that the free app that I was using had several bugs.  After researching online, I purchased a replacement app.  However, I now have to learn how to download the program.  It looks to me that I am downloading a trial version and that I have three or four copies of it.  How do I place an icon on the tablet, so that I click on it?  I need help!  I called to make an appointment with tech service, and for $9.99 I will get some assistance.  I was reading about a blogger who uses several apps for his site.  How did he become an expert?   She told me that he learned  by playing with his Android tablet.    Technology can be a "boon or bane" to borrow my friend's words.  Downright frustrating if you ask me.  Documents that disappear, wireless that goes out unexpectedly, browers that don't respond, photos that refuse to be cropped...