If your stomach can handle it go for the loading phase for faster results but in general 5grams daily for 2 months is perfectly fine. Then take a break for a month.
https://eu.shop.bodybuilding.com/products/dymatize-iso100-hydrolyzed-whey-protein-isolate?variant=39783002669234&skuid=DYM3610014 most Dymatize iso 100 flavors taste great!!!
Last one I tried https://eu.shop.bodybuilding.com/products/evlution-nutrition-creatine5000?variant=39782895616178&skuid=EVL2210034 had good results! 5 gr. daily for 2 months.