The short answer is avoid unsupported equipment....for example, you might find a "deal" on a receiver on Fleabay but if it's buggy or poorly designed, you likely wont get any satisfaction if you need FW upgrades or repairs.
As has been posted, before going any further what DO you want? What level of commitment are you willing to give. How much space do you have for dishes....YES, the most rewarding system has dishES.
FTA is more than anything else, a hobby, and the diligent (and fortunate) find A/V entertainment to suit their needs. If you prefer a "plug and play" no tinker service offering (so called) "premium services" 100% of the time, FTA probably isnt for you.
You've probably heard the phrase "size matters", and surely bigger is better is debatable in some things, but in FTA it is a fact of life. For dishes, not less than 39" for Ku reception, and 8' minimum for C band, 10' preferable.....and they need to be motorized, at least the C band dish. You can use multiple Ku dishes/LNBs and get the majority of the programming there.
Next....location, location, location..........a clear view of the southern sky is a must.........horizon to horizon is the optimum, but not many are that fortunate. How low in the southern horizon you need line of sight depends on where you are. The further north, the lower in the southern sky the satellites are. You should evaluate your site and be sure your not investing in something you will have to move to use.
Hope that is some useful food for thought. I always look forward to seeing newcommers join the fold. Hopefully this will pique your interest and you are in a position to explore it further. There are a lot of good folks here always willing to field any questions you can come up with.
Best of luck.