Question from a noob

Hi there, new keto enthusiast here. I have only been eating keto 4 days now. Have to say easiest plan I've ever tried. I do have a few questions I'm hoping some of the more experienced people will be able to answer. I have my macros, but I'm not quite sure what to do with them.

For instance, I assume I need to eat 25g or less of carbs per day. The protein and fat tho is that target or less for both or should the fat be a lot less since I'm trying to burn the fat I already have on m'bones? I'm only really asking because I just read on another post that fat bombs were mostly for maintenance.

I'm having a really hard time eating the target protein and fat at this point. I really have had little appetite for the last 6 months or so. Right around Christmas time, I started a new med that made my appetite almost nonexistent and over the next 3 months I lost 40lbs. Have been hovering there ever since.

Thanks for reading.