Yes, google market apps store is a pita with FT3 and similar devices from the same region, mainly cos it's not recgnised by the app store as an actual "phone", best bit of advice I can give is to get an android phone to fill the gap if you can afford it, otherwise you are into the world of hunting down apk files and trying to get round the app store limitations.
Read this forum for instance on "can't download apps" threads.
They are just pure fun, it's a kindle, it's a daily newspaper reader, it aggregates news into newsfeeeds, it plays games (similar to wiiware games though - but still fun), its a sat nav, and so much more, it feeds your brain which is exactly what I want it for, and it does it well if you have a modicum of computing language skills, like PC building, or PS or xbox or Wii modding etc.
Download the file, put it on an SD Card, turn on the tablet, tablet modifies its files and boots up, system is modded.
The files you download have been tweaked by devs to provide you with the best experience it can be, all you have to do is say thanks to the devs for sharing the spoils.
The only update you need to do is download the files as per the answer above.
Android is only going to get better & more prolific, get in there if you can and enjoy the ride, you can waste hours & hours on the tablet which is just the same as wasting hours & hours on other tablets that cost up to 4 times as much, and is just as equally good fun