launchkey key midi keyboard compatability

1 am totally new to this
I have a new launchkeymk3 61 keyboard and wants to know if the difficulties I have are to do with incompatability issues.
1. I played 'mary had a little lamb' and the outcome was gibberish
2. I had to press the keys hard to get any sound at all which may have distorted the sound???
3. The program icon was in the aps- finally found it - and I had kept trying to open the program from the installation icon exe - my fault but frustrating
Any advice?
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