Hi!! Here´s a new user from Spain … see you around here! 
Welcome here !
If you don’t already found it, Synfig Studio has a nice step by step manual and a lot of beginner to advanced tutorials. Also you could be interested in the synfig training course, finally, those forums are a huge knowledge data base (search is you friend).
d.j.a.y., thanks!. I started with step by step manual. And I found a wrong behavior on the interface (nothing serious) and I have reported to GitHub. And I’ll post in a few moments here in the forum a video with another strange behavior happens to me with the program under Windows and Linux. Of course after using the search