Welcome!
LOTS and LOTS of info available on here. As Neil says, do ask, someone will have hit the same problem and found a solution.
For what my advice is worth, before you buy any machines think about what you want to do. Then for the final decision buy a machine a little larger than you think. Your horizons will expand, and although fabulous work has been done on machines that appear to be too small, You can do small work on a big machine, but not the other way round. I am not suggesting that you go looking for a 21 inch Dean Smith and Grace, but try to avoid the frustration of finding that later jobs make your first machine struggle.
Good Luck, and Enjoy!
Howard