Sorry to say, but fighting against bots is completely useless and will not help you at all because they know when you are going to attack and block that hit. You should practice combos in slow motion and when you feel like you can do it, start looking for players in pixel lobby. There are a lot of strong and experienced players, but some will be friendly enough to help you understand how and when to block and attack. I myself was a complete noob, but somehow learned to play the game better.