you will lose muscle fullness on straight keto. go with CKD , carb keto which has the refeed at the end of the week. ckd works well if your higher than 15% , if your lower i would stick to a low carb 3 days , 4th day high carb with sweet potatoes or oatmeal and then back to low carb to get into the single digits without aas. keep veggies high! spina much spinach spinach.
full on keto is not a good idea , u will lose way more muscle than you would expect.