Hi Anton 'From out of' is not an unusual combination of words to find in English, and in most cases I would say it would not be a tautology. Your particular example, however, strikes me simply as odd wording, but I suppose if I had the entire context that might make a difference. Personally, I doubt that I would ever use 'from my heart' and 'out of my heart' synonymously, if that's what you're asking...
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.