If you are looking for a cheap, easy to learn, very traditional instrument which is not as finicky as a tin whistle, may I recommend a soprano recorder? It has very similar fingering, and it is easier to get down to playing songs, especially on your own. I have a similar musical background to you (Trumpet). You could also get yourself a practice chanter fairly inexpensively. The tin whistle, recorder, or chanter may be a great way to get some music back in your life. I would not get a toy recorder though. School supply stores sell great quality low price recorders.