Honestly, I would strongly recommend reading back over most of the posts from March (back to January, if you've the time)... There are some excellent pieces of advice, suggestions for surviving the first week, recipes, and just good old fashioned cheering... I read back often.

I've started as well this week! Super excited to see my results!

just a suggestion. i did a complete blood work-up a week before keto & every 2 months since. Lipid breakdowns/ratios (HDL, LDL, Triglycerides), Liver markers (ALT,ALP,GGT), Inflammatory markers (CRP & ESR), HBA1C (sugar average), Kidney marker (Creatinine), etc.

Not a necessity but interesting to monitor & chart your health markers from a scientific standpoint.

To help keep the "flu" feeling at bay, make sure you aim for 4500 mg of sodium as a minimum, and supplement with potassium (lo-salt is half potassium) and magnesium (citrate if using pills) if you aren't getting it from your foods - especially if you "forget" the salt. You need the salt to retain enough water to function, and if your salt drops, so will the other two. Any headaches that aren't solved by salt, etc. fat load until you can't stand it. I did these things and I had mild headaches with my first step down, and with my second, mild sinus effects... Good luck all!

I got a bit of keto-flu my first week. I read after the first week that water and maybe more salt would have eased it. That said, I got through it with headache powders.
Best,