Where do I even begin...

I feel like this is where I feel a bit overwhelmed by the process.  we are trained to eat low fat/high carb and its just going to take time to get that mindset changed.  Today is my first day on Keto and have 100#s to lose and going to Hawaii next year.   I've been to Maui many times but I want to go with not just a new mindset but a new look as well.  Oh and I have a really bad cold that has been kicking my butt for a week now.

So today I've had:  Coffee with MCT oil Blended, deli meat 2 slices of turkey, and 1/2 of a veggie burger.

I think I am going to meal prep my meals just so its easy to grab and go which means I need lunch advice.  If I did chicken or ground beef with a veggie what kind of fat would I use?

Also, I've read about these Fat Bombs and for the most part are they to be eaten as is or do eat them with something? Should these be eaten at the beginning?

Thanks in advance.