Welcome! You will find a lot of good advice here, and a lot of banter.
For what my advice is worth, and this is only repeating what many have said before.
Decide on what you want to make (Remember that you may eventually want to do other bigger and more complicated things)
Search through the Forum for comments on the sort of machine that you have in mind to buy (Don't be surprised at widely differing views on the same machine – depends upon individual experiences, BEFORE you buy it). You will find some excellent folk and advice here
And remember what I was told, "You can do small work on a big machine, but not the other way round", so if in doubt go for a bit larger than you first think. Almost certainly, you will find yourself making attachments / accessories / gadgets that ,make life easier, or allow you to do things that seemed impossible at first.
Having said that, splendid work has been done on machines that are supposedly too small!
Lastly, ENJOY YOURSELF!
Howard