I have recently purchased my first decent knife a Tojiro DP Utility 150mm and was wondering what grits should I get for my whetstone to sharpen the blade and how steep is the learning curve to use a whetstone since I have never used one before? At what angle should I be sharpening? Should I also get a flatterer as well? I have no idea, if you would be so kind to share with me your knowledge and experience it would be most appreciated 
Thank you,
Thank you,